(A python question)Write a function that will be given a list of strings. You need to dene the function prototype and the function body. Your function must return a list of strings starting with 'H' or 'h' (uppercase or lowercase). Otherwise return an empty list if the given list is value None.

Restrictions: In your function you may only use while loops, if statements, function len(), keywords elif, else, return, break, continue, def, None, is, .append and any arithmetic operators. Do not use a for loop, marks will be deducted.