Please step by step

9 Suppose that MRP_ = 20- 0.5L for left-handed workers, where L = the number of left-handed workers and MRPL is measured in dollars per hour. The going wage for left-handed workers is $10 per hour, but employer A discriminates against these workers and has a discrimination coefficient, D, of $2 per hour. Graph the MRP_ curve and show how many left-handed workers employer A hires. How much profit has employer A lost by discriminating