Please submit the following exercises as C++ files. 1. Write a program that takes 5 input numbers and outputs the mean (average)and standard deviation of the numbers. If the numbers are x1, x2, x3,...

Please submit the following exercises as C++ files.
1. Write a program that takes 5 input numbers and outputs the mean (average)and standard deviation of the numbers. If the numbers are x1, x2, x3, x4, and x5, then the mean is x + (x1 + x2 + x3 + x4 + x5) / 5
Your program must contain the following functions: a function that calculates and returns the mean and a function that calculates the standard deviation. (Please note that ^2 indicates the values are squared – the superscript did not work in the Word document)
Note: this is not a difficult assignment. It needs to be broken down into its simplest forms. Consider that a function is designed to do a single activity. Standard deviations are a very common business tool.
Save this problem as _std_dev.cpp.

2. During the tax season, every Friday, the J & J tax accounting firm provides assistance to people who prepare their own tax returns. Their charges are as follows:
a. If a person has low income (<= 25,000)="" and="" the="" consulting="" time="" is="" less="" than="" or="" equal="" to="" 30="" minutes,="" there="" are="" no="" charges;="" otherwise="" the="" service="" charges="" are="" 40%="" of="" the="" regular="" hourly="" rate="" for="" the="" time="" over="" 30="">
b. For others, if the Consulting time is less than or equal to 20 minutes, there are no service charges; otherwise, service charges are 70% of the regular hourly rate for the time over 20 minutes.
(For example, suppose that a person who has low income is spent 1 hour and 15 minutes, and the hourly rate is $70.00. Then the billing amount is $70.00 x 40 x (45/60) = $21.00).