Write a function exclaim$($s$)$ that takes an arbitrary string $s$ as input and uses recursion to form and return

the string formed by adding an exclamation point $($i$.$e$.,$ the character $\text{'}!\text{'})$ after each character in the string

s$.$ Here are four examples:result: $\text{'}$h$!$e$!$l$!$l$!!$o$!$'result: $\text{'}$w$!$o$!$w$!$'result: $\text{'}$o$!$'result: $\text{'}\text{'}$

This function is somewhat similar to the remove$\_$spaces function from Lab $3,$ because it needs to recursively

create a new string from an existing string. However, your function will be simpler, because it won't need to

decide what to do after the recursive call returns.

Don't forget to test your functions using the approaches mentioned at the start of Problem $3.$