StartUp.cs

public abstract class Driver
{
    private string name;
    private double totalTime;
    private Car car;
    private double fuelConsumption;
    private double speed;

    public virtual double Speed
    {
        get { return speed; }
        protected set
        {
            value = (Car.HP + Car.Tyre.Degradation) / Car.FuelAmount;
            speed = value;
        }
    }

    public virtual double FuelConsumption
    {
        get { return fuelConsumption; }
        protected set { fuelConsumption = value; }
    }

    public Car Car
    {
        get { return car; }
        protected set { this.car = value; }
    }

    public double TotalTime
    {
        get { return totalTime; }
        protected set { totalTime = value; }
    }

    public string Name
    {
        get { return name; }
        protected set { name = value; }
    }

    protected Driver(string name, Car car)
    {
        this.Name = name;
        this.TotalTime = 0;
        this.Car = car;
    }
}

///

public class AggressiveDriver : Driver
{
    private double speed;

    public override double Speed
    {
        get { return speed; }
        protected set { speed = base.Speed * 1.3; }
    }

    public AggressiveDriver(string name, Car car) : base(name, car)
    {
        this.Name = name;
        this.Car = car;
        this.FuelConsumption = 2.7d;
    }
}

///

public class EnduranceDriver : Driver
{
    public EnduranceDriver(string name, Car car) : base(name, car)
    {
        this.Name = name;
        this.Car = car;
        this.FuelConsumption = 1.5d;
    }
}

///

using System;

public class Car
{
    private long hp;
    private double fuelAmount;
    private Tyre tyre;

    public Tyre Tyre
    {
        get { return tyre; }
        private set { tyre = value; }
    }

    public double FuelAmount
    {
        get { return fuelAmount; }
        private set
        {
            if (value < 0)
            {
                throw new ArgumentException("Out of fuel");
            }
            fuelAmount = value;
        }
    }

    public long HP
    {
        get { return hp; }
        private set { hp = value; }
    }

    public Car(int hp, double fuelAmount, Tyre tyre)
    {
        this.HP = hp;
        this.FuelAmount = fuelAmount;
        this.Tyre = tyre;
    }
}

////

using System;

public abstract class Tyre
{
    private string name;
    private double hardness;
    private double degradation;

    public virtual double Degradation
    {
        get { return degradation; }
        protected set
        {
            if (value < 0)
            {
                throw new ArgumentException("Blown Tyre");
            }
            degradation = value;
        }
    }

    public double Hardness
    {
        get { return hardness; }
        protected set { hardness = value; }
    }

    public string Name
    {
        get { return name; }
        protected set { name = value; }
    }

    protected Tyre(double hardness)
    {
        this.Hardness = hardness;
        this.Degradation = 100;
    }

    public virtual void DegradeTyre()
    {
        this.Degradation -= this.Hardness;
    }
}

////

using System;

public class UltrasoftTyre : Tyre
{
    public UltrasoftTyre(double hardness) : base(hardness)
    {
        this.Grip = grip;
    }

    private double grip;
    private double degradation;

    public override double Degradation
    {
        get { return degradation; }
        protected set
        {
            if (value < 30)
            {
                throw new ArgumentException("Blow Tyre");
            }
            degradation = value;
        }
    }

    public double Grip
    {
        get { return grip; }
        protected set { grip = value; }
    }

    public override void DegradeTyre()
    {
        double sum = this.Hardness += this.Grip;
        this.Degradation -= sum;
    }
}

///

public class HardTyre : Tyre
{
    public HardTyre(double hardness) : base(hardness)
    {
        this.Hardness = hardness;
    }
    public override void DegradeTyre()
    {
        this.Degradation -= this.Hardness;
    }
}