CellPhoneBill(m, tx)Write the function cellPhoneBill()that takes two int m and txas input and returns a float. The function takes total number of minutes and text messages that user spends in a particular month and returns the bill amount. These is the policy of the carrier company:

The solution code is written in C++

Explanation:

Firstly, declare a function named cellPhone() that takes two input parameters, m and tx (Line 1).

Since the policy of the carrier company is not given in the question, I make a presumption that the cost per minutes is $0.10 and the cost per message is $0.20 (Line 2- 3).

Next, apply the formula m * COST_PER_MIN + tx * COST_PER_MESSAGE to calculate the total bill (Line 5) and return the bill_amount as function output (Line 7).

i think the answer is a or d