My standard deviation is correct. i am having trouble finding a and b

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 5% chance that it will not make any hires and a 13% 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 0.74