please (a) through (f)

A construction rm places bids on various portions of the work in building a new ofce tower. The key bids it submits are for electrical work and for plumbing. The bid for the electrical work estimates 30 weeks of labor (for example, 1 electrician for 30 weeks or 6 for 5 weeks). The bid for the plumbing estimates 130 weeks of labor. Standard procedures indicate that the standard deviation for these estimates are 6 weeks for electrical work and 15 weeks for plumbing. Complete parts (a) through (f). f ..... '\\ e (a) Find the expected number of weeks of labor provided by the company if it wins both bids. Let X denote the number of weeks of electrical work, and Y denote the number of weeks of plumbing work. E(X + Y) = D weeks