Specialty Steel has carefully measured production in its new plant to determine whether it is technically efficient in production. It has found that the production function of the firm is represented by the following equation

where Q is output level, K is capital and L is labor.
The firm currently owns 100 units of capital equipment and employs 16 units of labor. The inputs are hired in perfectly competitive markets, and the firm faces input costs as follows: The price of labor (w) is $10 per unit and the rental price of capital (r) is $1.25 per unit.
You have been hired as a consultant to assist Specialty in increasing profitability.
a. find out the following:
i. Marginal product of labor.
ii. Marginal product of capital.
iii. Marginal rate of technical substitution.