profit maximising monoloys

can anyone help?

A monopoly firm has a total revenue function:

and a total cost function:

where R, C and Q are total revenue, total cost and quantity respectively.

(a)Calculate:

i. The monopolist’s profit maximising output and price.

ii. The value of total profit at the profit maximising price and output.

iii. The co-efficient of price elasticity at the profit maximising price and output.

iv. How will your calculations in i. and ii. above be affected by a lump sum tax of 30?