Please help me check number 11. And help me solve 12,13, and 14 please

11. An old cannon hits the target with 0.15 probability. What is the probability that cannon hits the target in 4 shots? P ( Hitting 4 shots) 1 - ( 1- 0.15 ) 14 = 0.47 799 375 12. An old cannon hits the target with 0.15 probability. How many shots are needed to hit the target with probability greater than 0.90? 13. There are 6 RED boxes that contain 3 nickels and 2 quarters each, 11 BLUE boxes that contain 5 nickels each, and 3 GREEN boxes that contain 9 nickels and 1 quarter each. A coin is drawn randomly from one of the boxes. What is the probability that selected coin is nickel? . If it is nickel, what is probability that it is taken from RED box