xi $=0,1$

for

i $=1,2,3,4,5,6$

According to this model, what is the maximum net present value $($in $$)?$

$

$($b$)$

Suppose that if the Advertising campaign is chosen, then the Test market new product alternative must be chosen. Modify your model from part $($a$)$ to take this into account.

In addition to the constraints from part $($a$),$ what additional constraint should be added to the integer programming model?

According to this model, what is the maximum net present value $($in $$)?$

$