1. If two dice are rolled simultaneously, find the probability of the following events: (a) Getting the sum of the numbers on the upper faces which is not a prime number (b) Getting the sum of the numbers on the upper faces which is not a perfect square

3. If two dice are rolled simultaneously, find the probability of the following events: (a) The numbers on the upper faces have a difference of 2 (b) The product of the numbers on the upper faces is a multiple of 6