$1.$ The allotted marks for each part are indicated for each question

$2.$ Be clear and to the point

$3.$ Marks will be awarded based on precision of answers, clarity of arguments, neatness of the work and correctness of the solution.

QUESTION $(100\%$ Marks$)$

A company has to decide which advertising method to be used in marketing a product in the next period. Advertising method A$,$ which is currently used, Costs TZS $10$ million per week and is expected only to maintain sales. From past experience of using method A$,$ the likelihood of weekly sales in the next period $($with A$)$ has been estimated as given below:

Unit weekly sales Probability of weekly sales if A is used

$01000$

$200-4000\mathrm{.}3$

$400-6000\mathrm{.}4$

$600-8000\mathrm{.}2$

$800-10000\mathrm{.}1$

Advertising method B would cost TZS $37$ million per week and sales are expected to be $50\%$ higher than that of A$.$ Advertising method C would cost TZS $60$ million per week and sales would be $100\%$ higher than those of A

REQUIRED

Using the decision tree, advise on the best decision to be taken regarding the advertising methods that should be adopted.