In an effort to cut costs and improve profits, many US companies have been turning to outsourcing. In fact, according to "Purchasing" magazine, 57% of companies outsourced some part of their...

I don't know how to do part b of this question. Please help!!

Extracted text: In an effort to cut costs and improve profits, many US companies have been turning to outsourcing. In fact, according to "Purchasing" magazine, 57% of companies outsourced some part of their manufacturing process in the past two to three years. You would like to verify this complaint, and surveyed 558 companies. Show your answer to 4 decimal places if necessary. a. What is the distribution of p? p - N( 0.57 0.0210 b. What is the probability that between 306 and 317 companies outsourced some part of their manufacturing process in the past two or three years? 0