Consider the well failure data in Exercise 2-53. Let A denote the event that the geological formation has more than 1000 wells and let B denote the event that a well failed. Determine the following probabilities. (a) P1A ¨ B2 (b) P1A ´ B2 P1A¿´B¿2 (c) (d) Use the total probability rule to determine P(A)