$1.$ Write a python program that writes to a file named NumberList.txt; it should use a loop to write the numbers $1$ through $100$ to the file, each in a separate line, then closes the file.

$2.$ Write a python program that reads numbers from the NumberList.txt file $($the one you created above$),$ reads all the numbers and displays them to the screen. The program should also add all the numbers in the file and display their total.

$3.$ Write a python program that opens a directory, reads all the sequence files in that directory and prints out their sequences into another file $($not the console or screen$)$ called Output.txt$.$ The sequences should end with a $||$ on a separate line. So for example if your directory has two sequence files and...

Seq$1.$txt contains this sequence:

$>$seq$1$ GAAACCAA

and seq$2.$txt has this sequence

$>$seq$2$ GCCCATTTT

Then the Output file should look like this:

$>$seq$1$ GAAACCAA

$||$

$>$seq$2$ GCCCATTTT

$||$