can you please help me with this?

2. (5 points) Find the domain of v 25 - a:2. Write your answer in interval form. Suppose that the price per unit in dollars of a cell phone production is modeled by p = 45 - 0.0125x, where a is in thousands of phones produced, and the revenue represented by thousands of dollars is R. = x . p. Find the following: (a) (1 point) the revenue function in terms of J. (b) (4 points) production level that will maximize revenue. (c) (2 points) maximum revenue. (d) (3 points) Price per unit of a cell phone when 3500 cell phone is produced