This is a given grammar: V -> V + V | V - V | V * V | V / V | num 1. Which of the following are unambiguous?

2. Which of the following match same grammar as the one given?

OPTIONS: (1) V -> num + V | num - V | num * V | num / V | num (2) V -> V + num | V - num | V * num | V / num | num (3) V -> num + V | V - num | num * V | V / num | num

(4)

V -> num + V' | num - V' | num + V | num - V

V' -> num * V' | num / V' | num (5)

V -> V' + V | V' - V | V'

V' -> num * V' | num / V' | num Please explain why these options go into the categories (unambiguous/matches given grammar) that they do.