A computer$$ company's cost$$ function, which relates its average cost of production AC to its cumulative output in thousands of computers Q and its plant size in terms of thousands of computers produced per year q$($within the production range of$10,000$ to$50,000$ computers$),$ is given by

ACequals$=1010$minus$0\mathrm{.}100\mathrm{.}10$Qplus$+0\mathrm{.}300\mathrm{.}30$q$.$

Part $2$

Is there a$$ learning$-$curve effect? A$$ learning$-$curve effect

Part $3$

A$.$

exists because average costs decrease as current$$ output, q$,$ increases.

B$.$

does not exist because average costs decrease as cumulative$$ output, Q$,$ increases.

C$.$

exists because average costs increase as current$$ output, q$,$ increases.

D$.$

exists because average costs decrease as cumulative$$ output, Q$,$ increases.

E$.$

does not exist because average costs increase as current$$ output, q$,$ increases.