First thing, an advice: Don't be rude to the people and read following links. They will help you in future questions:
What have you tried?[
^]
How to ask a question?[
^]
Some guidelines for posting questions in the forums[
^]
best way to post code snippets[
^]
Second... and coming to your question:
Task 1: No idea what you want / need to do there
Task 2: There are several options, but the easiest one would be:
- ask for a letter
- get the letter and find out its numeric value
- one for going from the numeric value of the given letter, to "A" (65 in decimal), decreasing by one
- another nested for with the same index, to write out the number of letters you need to
- coming back to the first for, give a new line
- other for going from the letter "A" to "Given letter - 1"
- secondary nested for to print out the number of letters you need
- giving a new line "\n" and looping again
good luck.