Need detailed calculation

1.13. Three missiles are to be fired at a target with equal probability of success and with the target destroyed once hit. An observer identifies the missile that hit the target with equal probability. Denote the event of a missile hitting the target by M, and the event of the observer identifying a missile by Oj, i = 1,2,3, where i denotes the number of the missile. a) Form a table for the joint and marginal probabilities Mi, Of, i = 1,2,3. b) Determine the probability that the first missile hit the target if the observer determined that the second missile hit the target. c) Determine the probability that the first missile hit the target if the observer determined that the second missile did not hit the target