The schedule is missing, but you can answer it according to the requirements in the question.

Set the promo of A to play X times and B to play Y times.

So you get 0.5 * x+y.

3.5 * x+y & lt； = 16 (publicity time)

The number of optimal solutions is x=4, y= 1.

But there is no timetable, so this answer is not correct.

thank you