Suppose the firm short run production function is a quadratic one in the form: Q = 2L+ 0.25 L2, the firm hires any number of workers at a wage of $40/day, and sell any quantity of its output at a...

Suppose the firm short run production function is a quadratic one in the form: Q = 2L+ 0.25 L2, the firm hires any number of workers at a wage of $40/day, and sell any quantity of its output at a price of $4. Find how many workers should this firm hire to maximize profits.