Using x skilled and y unskilled workers, a manufacturer can produce Q(x, y) = 3x + 2y units per day. Currently the workforce consists of 10 skilled workers and 20 unskilled workers.

a. Compute the current daily output.

b. Find an equation relating the levels of skilled and unskilled labor if the daily output is to remain at its current level.

c. On a two-dimensional coordinate system, draw the isoquant (constant production curve) that corresponds to the current level of output.

d. What change should be made in the level of unskilled labor y to offset an increase in skilled labor x of two workers so that the output will remain at its current level?