In Example $9\mathrm{.}2,$ a technological failure implies that

the game is over$$the product must be abandoned.

Change the problem so that there are two levels of

technological failure, each with probability $0\mathrm{.}1.$ In the

first level, Acme can pay a further development cost D

to fix the product and make it a technological success.

Then it can decide whether to market the product.

In the second level, the product must be abandoned.

Modify the decision tree as necessary. Then answer

the following questions.

a$.$ For which values of D should Acme fix the product

and then market it$,$ given that the first level of

technological failure occurs?

b$.$ For which values of D is Acme$$s best first decision

still to $$continue development$?$

c$.$ Explain why these two questions are asking differ$-$

ent things and can have different answers.