An engineering company advertises a job in in 3 papers, A, B, and, C . It is known that these papers attract undergraduate engineering readerships in the proportions 2:3:1. The probability that an engineering undergraduate sees and replies to the job advertisement in these papers are 0.002, 0.001, and 0.005 respect. Assume that the undergraduate sees only one advertisement.

a) what is the probability that the engineering undergraduate readership sees and replies for the job?

b)If the engineering company receives only one reply to its advertisements, what is the probability that the applicant has seen the job advertised in paper B?

c)If the company receives two replies, what is the probability that both applicants saw the job advertised in paper A?