ruby

class Student < Person
    def initialize(firstName, lastName, id, scores)
        super(firstName)
        super(lastName)
        super(id)
        @scores = scores
    end
    def calculate()
        fin = scores/2
     puts "O" if fin >= 90 && fin <= 100
     puts "E" if fin >= 80 && fin < 90
     puts "A" if fin >= 70 && fin <= 80
     puts "P" if fin >= 55 && fin < 70
     puts "D" if fin >= 40 && fin < 55
     puts "T" if fin < 40
    end
end