A factory can produce two products, x and y, with a profit approximated by P=14x+22y- 900. The production of y can exceed x by no more than 200 units. Moreover, production levels are limited by the formula x+2y≤ 1600. What production levels yield maximum profit?
a. x=400; y=600
b. x=0; y=0
c. x=1,600; y=0
d. x=0; y=200
