(a) Question (a) is sensical, and the answer to it is E = 0.2*10000 + 0.4*0 - 0.3*5000 - 0.1*8000 = -300 dollars. In wording form, it means that this business will produce 300 dollars loss in the first year, in average, if repeat this experiment many times. (b) Question (b) is non-sensical, from any point of view, so I will not even try to answer it. I only may advise do not compose and do not ask non-sensical questions in the future.