Given the following segment of code,
// postcondition: returns x + y public int add(int x, int y) {}
// postcondition: return x * y public int multiply(int x, int y) {}
which of the following corresponds to this expression?
multiply(add(multiply(a, b), add(multiply(a, c), multiply(b, 2)
1.a * b + a * c + b * c * 2
2.a * b + a * c + b * c + 2
3.a * b + (a * c + b * c)
4.(a * b + a * c + b * c) * 2
5.2 * a * b + (a * c + b * c)