If the total cost (in £s) function is given by

TC = 2Q^{2}+ 158Q - 12000

where Q is the quantity produced

(a) What Q would minimise total costs?

Give your answer to 2 decimal places.

(b) Use your value in (a) to find the minimum value for total costs.

Give your answer to the nearest

pound.

Please show me how to get the answer. I would be extremely grateful. Thank you.