////Abdulloeva Frazona
console.log("№1")
{
let a = 20,
b = 15;
if (a > b){
    console.log("a больше b");
}
else if(b > a)
{
    console.log("b больше a");
}
}

console.log("№2")
////////
{
let age = 2007;
if((age%4 == 0) && (age%100 != 0) || (age%400 === 0)){
    console.log(" Этот год является высокосным ");
}
else {
    console.log(" Год не является высокосным ");
}
}

console.log("№ 3")
{
    let a = 1,
    b = 3,
    c = 2, d, x1, x2;
    d = b*b - 4*a*c;
    x1 = ((-1)*b - Math.sqrt(d))/2*a;
    x2 = ((-1)*b + Math.sqrt(d))/2*a;
    console.log("x1 = " + x1 + " x2 = " + x2);
}

////////////////////
console.log("№4")
{
    let a = 4, b = 5, c =6;
    if (( a > b ) && ( a > c )){
        console.log( "a is max");
    }
    else if (( b > a ) && ( b > c )){
        console.log( "b is max");
    }
    else if ((c > a ) && ( c > b )){
        console.log("c is max");
    }
    else if (( a === c ) && ( a > b)){
        console.log(" a and c are max ");
    }
    else if (( b === a ) && ( b > c)){
        console.log(" b and a are max ");
    }
    else if (( c === b ) && ( c > a)){
        console.log(" c and b are max ");
    }
    else if (( a === b) && (b === c )){
        console,log(" All of them are equal ")
    }
}

/////////////////////
console.log("№ 6")
{
    let a = 3, b = 4, c = 8;;
    if((a+b)>c && (b+c)>a && (a+c)>b){
        console.log("DA")
    } else {
        console.log("NET");
    }
}

///////////////////////////
console.log("№ 5")
{
    let x = -1, y = 2, M;
    M = 3*x + y + 1;
    if(M === 0){
        console.log("Данная точка лежит на прямой")
    }
    else{
        console.log("Данная точка не лежит на прямой")

    }
}

/////////////////
console.log("№ 7")
{
    let p1 = 500, p2 = 60000, p3 = 2500, a;
    if(p1 <= 1000) {
        a = (15 * p1) / 100;
        console.log(" p1: " + p1 );
        console.log(" keshbek ot p1: " + a );
      }

    else  if ((p1 > 1000) && (p1 <= 3000)) {
      a = (10 * p1) / 100;
        if(a > 3000) {
          a = 3000;
        }
      console.log(" p1: " + p1 );
      console.log(" keshbek ot p1: " + a );
      }
    else {
        a = (5 * p1) / 100;
        if(a > 3000) {
          a = 3000;
        }
        console.log(" p1: " + p1 );
        console.log(" keshbek ot p1: " + a );
      }

    if(p2 <= 1000) {
      a = (15 * p2) / 100;
      console.log(" p2: " + p2 );
      console.log(" keshbek ot p2: " + a );
    }

   else  if ((p2 > 1000) && (p2 <= 3000)) {
    a = (10 * p2) / 100;
      if(a > 3000) {
        a = 3000;
      }
    console.log(" p2: " + p2 );
    console.log(" keshbek ot p2: " + a );
    }
    else {
      a = (5 * p2) / 100;
      if(a > 3000) {
        a = 3000;
      }
      console.log(" p2: " + p2 );
      console.log(" keshbek ot p2: " + a );
    }

    if(p3 <= 1000) {
      a = (15 * p3) / 100;
      console.log(" p3: " + p3 );
      console.log(" keshbek ot p3: " + a );
    }

   else  if ((p3 > 1000) && (p3 <= 3000)) {
    a = (10 * p3) / 100;
      if(a > 3000) {
        a = 3000;
      }
    console.log(" p3: " + p3 );
    console.log(" keshbek ot p3: " + a );
    }
    else {
      a = (5 * p3) / 100;
      if(a > 3000) {
        a = 3000;
      }
      console.log(" p3: " + p3 );
      console.log(" keshbek ot p3: " + a );
    }
  }