E$\mathrm{.}5$ Beth Zion Hospital has received initial certification

from the state of California to become a center for liver transplants.

The hospital, however, must complete its first $18$ transplants

under great scrutiny and at no cost to the patients. The

very first transplant, just completed, required $28$ hours. On the

basis of research at the hospital, Beth Zion estimates that it will

have an $85\%$ learning curve. Estimate the time it will take to complete:

a$)$ the $5$th liver transplant.

b$)$ all of the first $5$ transplants.

c$)$ the $18$th transplant.

d$)$ all $18$ transplants. PX

E$\mathrm{.}6$ Refer to Problem E$\mathrm{.}5.$ Beth Zion Hospital has just

been informed that only the first $10$ transplants must be performed

at the hospital