Need help with question a, b, and c ASAP

The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a a. Compute the expected number of arrivals per minute. period of 200 minutes, with the results shown in the table below. Complete (a) through (c) to the right. Arrivals Frequency PEI-1 p = (Type an integer or decimal rounded to three decimal places as needed.) ; 2: b. Compute the standard deviation. 3 3; 5 21 (Type an integer or decimal rounded to three decimal places as needed.) 3 151 c. What is the probability that there will be fewer than 2 arrivals in a given minute? 8 2 P(x