Question

question 2: if alberto needs to download a apps, what is the least expensive plan?
cost
least expensive plan for a:
no plan
basic plan
premium plan
either no plan or basic plan
either basic plan or premium plan
either no plan or premium plan

Explanation:

At the number of apps A (marked by the vertical dashed line), the cost line for the Premium plan is the lowest among the three options, meaning it is the least expensive.

Answer:

Premium plan