How do you complete these without hardcoding or using inbuilt libraries

return object representing fraction that is a result of multiplying calling object with parameter object for example: if calling object represents -3/7 and parameter object represents 12/-2 return object representing fraction -36/-14 public Fraction multiply(Fraction other) { return other; }

return object representing the simplified form of the calling object. for example, if calling object represents -120/-64, return object representing the fraction 15/8 since -120 = 15*-8, and -64 = 8*-8 dividing both numerator and denominator by -8, you get 15/8 public Fraction getSimplifiedForm() { return null; }