Linux please. bash shell.

$1.$Your script will then solve each of these Arithmetic Expansion exercises.

a$.$Echo to results of arithmetic expansion of $12*5$

b$.$Store the results of arithmetic expansion of $12*5$ in a variable you make called ae$1$

c$.$Echo $$The contents of ae$1$ are: $$ and put the answer after the colon.

d$.$Create a variable called ae$2$ and store in it the answer of $10$ times ae$1$

e$.$Echo $$The contents of ae$2$ are: $$ and put the answer after the colon.

f$.$Using wc you can count the number of words and number of characters in a file.

Use this knowledge and arithmetic expansion to find the average number of characters in the words of a file. The math would be total characters divided by total words.