Answer 1

Use a dictionary.
Loop over the letters
Check if the current letter is in the dict as a key. If not, then add the letter with an initial value of 1. If yes then increment the value by 1.
After the loop, output the dictionary.

You can also use a Counter() object from the collections class, passing it the string and then converting to a dict for output.

Answer 2

hasnain siddiq89
First show your attempts.
What you had tried.

Answer 3

Attempt

Answer 4

The code you tried

Answer 5

use len()

Answer 6

Hint:
Define a counter,define a item to find, iterate the objects and increase the counte every time, if the item is found.