In Exercises 15-22, assume that relative maximum and minimum values are absolute maximum and minimum values.

Two-variable revenue maximization. Repeat Exercise 20, using

q 1 = 64 − 4 p 1 − 2 p 2 and

q 2 = 56 − 2 p 1 − 4 p 2.

a. R=64 p 1 − 4 p 1 2 − 4 p 1 p 2 + 56 p 2 − 4 p 2 2 ;

b. p 1 = 6 ,

or $60, p 2 = 4 ,

$40;

c. q 1 = 32 ,

3200 units, q 2 = 28 ,

or 2800 units;

d. $304,000