a$)$ In lab$5.$js$,$ write a function named sumEvery$5$th that accepts a nonnegative integer n and returns the sum of the integers divisible by $5$ from $1$ to n$,$ including n itself. Use a for loop in your function to solve this problem.

b$)$ Run the two tests shown below in the console to verify your function works properly.

$//$ Tests

console.log$($sumEvery$5$th$(20))$; $//$ expect $50...5+10+15+20=50$ console.log$($sumEvery$5$th$(0))$; $//$ expect $0$

c$)$ Create a lab$5.$html file in your L$5$ folder that has a textarea element. Add code in your JavaScript file to call the sumEvery$5$th function with an argument of $20$ and display the value it returns in the textarea of the web page. Hint: this was done in the pirate translation application.