Write a C$++$ program to calculate the statistics of student marks. There are $10$ student

marks stored in a floating$-$point array of type double: $,$

$78\mathrm{.}0,70\mathrm{.}0,72\mathrm{.}5,85\mathrm{.}5,90\mathrm{.}5,73\mathrm{.}0.$ Use a function to calculate the mean of the

student marks based on the equation as follows:

$=\frac{{\displaystyle \underset{i=1}{\overset{N}{}}}{x}_i}{N}$

Use another function to calculate the standard deviation of the marks based on

the equation as follows:

$=\sqrt[\phantom{2}]{\frac{{\displaystyle \underset{i=1}{\overset{N}{}}}(x-{)}^2}{N}}$

Return the final results of the calculation to the main function to be printed out.