I need help with question 4, which is: Calculate the covariance of the expected cash-flow per dollar invested in the project with the return on the market, that is,

Cov(ri,rm)=E[(ri?E[ri])(rm?E[rm])]

HINT: Using the probabilities from the table forpim, plug in the realizedriandrmfor the different scenarios (e.g.m=bandi=soccurs with probabilitypbs= 48%and has realized returns ofrm=rb=?2%andri=rs=100%), as well as your answers to 2. and 3. forE[ri]andE[rm].

The joint probability table is attached.

I have the following answers to aid: E[ri]=.28, E[rm]=.052, Variance of Market Returns=.0035, Bi of project=10