Solve by hand $($no importing python variable, and no AI code$)$ Using the text files ages$1,$ ages$2$ and ages$3$

Write a program that calculates the mean and standard deviation for each data file that the user inputs the name of and produces screen output as well as writing all results to a text file named meansigma.txt$.$ Use $4$ functions which you create named GetDataFile$(),$ FindMean$($lst$1),$ FindStdDev$($lst$2),$ OutResults$(1$st$3)$ and calling them appropriately.

The mean $$ is given by the following formula:

$=\frac{{\displaystyle \underset{?}{\overset{?}{}}}{x}_i}{n}$

The standard deviation $$ is given by the following formula:

$=\sqrt[\phantom{2}]{\frac{{\displaystyle \underset{?}{\overset{?}{}}}(x_i-{)}^2}{n}}$

Output file format is:

File Ages$1$: mean $=1\mathrm{.}94,$ sigma $=1\mathrm{.}0198$

File Ages$2$: mean $=19\mathrm{.}50,$ sigma $=0\mathrm{.}9574$

File Ages$3$: mean $=20\mathrm{.}20,$ sigma $=0\mathrm{.}7483$