Exercise 5-17 Algo A marketing firm is considering making up to three new hires. Given its specific needs, the management feels that there is a 55% chance of hiring at least two candidates. There is only a 6% chance that it will not make any hires and a 20% chance that it will make all three hires. a. What is the probability that the firm will make at least one hire? (Round your answer to 2 decimal places.) Probability b. Find the expected value and the standard deviation of the number of hires. (Round intermediate calculations to at least 4 decimal places. Round your final answers to 2 decimal places.) Expected value Standard deviation a. Convert the above probability distribution to a cumulative probability distribution. (Round your answers to decimal places.) Grade P(X x) O(F) 1(D) 2(C) 3(B) 4(A) b. What is the probability of earning at least a B in Professor Sanchez's course? (Round your answer to 3 decimal places.) Probability c. What is the probability of passing Professor Sanchez's course? (Round your answer to 3 decimal places.) Probability