Solution:
(a) Maximum profit is the highest difference between the revenue R(q) and the cost C(q)/
Hence, the maximum profit from the given table is;

Thus, the production level is approximately at;

(b) The price P, of the product is;

The price is 2.25 dollars.
(c) Fixed costs are costs that do not change when sales or production volumes increase or decrease.
Thus,
The fixed costs is 3750 dollars.