Consider the total cost function TC= 120y-y^2+0.02y^2. a. What level of y yields minimum cost per unit of y? b. What is the relationship between MC and AVc at the above level of output?

Consider the total cost function TC= 120y-y^2+0.02y^2.

a. What level of y yields minimum cost per unit of y?

b. What is the relationship between MC and AVc at the above level of
output?