Just trying to check if there is an error in the options given in an exam paper I am working through:

The question is:

Maui Macadamia Inc has a monopoly in the macadamia nut industry. The demand curve, marginal revenue and marginal cost curve for macadamia nuts are given as follows:

P = 50 - 5Q

MR = 40 - 3Q

MC = 2

(1) What is the profit-maximising level of output?

(Please show calculations)

(2) At the profit-maximising level of output, what is the level of consumer surplus?

(Please show calculations)