A marketing firm is considering making up to three new hires. Given its specific needs, the management feels that there is a 45% chance of hiring at least two candidates. There is only a 7% chance that it will not make any hires and a 15% 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.)

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.)