Hello tutors answer the following questions.

"A profit-maximising monopolist will aim to maximise total revenue if the marginal cost of the product supplied is zero at all output levels." Discuss this assertion, and draw a diagram to illustrate a monopoly in this position. [6]The entries for age 60 in a multiple decrement table with decrements for death and retirement are as follows: Age (al)x (ad) (ad), 60 10,000 200 400 If (al) =9,000, 961 =960 and decrements operate uniformly over the year of age in the multiple decrement table, calculate the value of 961 . [4]