For this exercise you will need to complete $2$ functions:

The get$\_$letter$\_$frequency $()$ function that takes a single string parameter, text. Use your code for

the get$\_$letter$\_$frequency $()$ function in the previous question and modify it so that the list returned

by the function contains letter frequency tuples for alphabetical characters that appear at least once in

the parameter text.

The draw$\_$letter$\_$frequency$\_$chart $()$ function that takes a single list parameter

letter$\_$freq$\_$list. The parameter list consists of letter equency tuples as generated by the

get$\_$letter$\_$frequency $()$ function. Using this list of letter frequency tuples, the function draws a

barchart for the letter frequencies. The format of the barchart can be seen in the examples below.

Some examples of the functions being called are shown below.