Solve this:

Q.1 Two dice are thrown simultaneously. If at least one of the dice shows number 5, what is the probability that, sum of the numbers on two dice is 9?

Q2. A pair of dice is thrown. If sum of the numbers is an even number, what is the probability that it is a perfect square ?
 
Q3. A box contains 11 tickets numbered from 1 to 11. Two tickets are drawn at random with replacement. If the sum is even, find the probability that both the numbers are odd.

Q4. A card is drawn from a well shuffled deck of 52 cards. Consider two events A and B as 
       A ; a club card is drawn. B: an ace card is drawn. Determine whether the events A and B are independent or not.