Plz use python3 to do this question

Write a write a function to replace every lowercase character to its uppercase equivalent. You may not use upperO, and your solution must use the ordO and/or chr) functions. You may not use functions like encode or replace either - you are expected to use loops to accomplish this replacement. This function must take only the string to be modified as an argument and must return the new string. Write a function to replace atleast four different phrases (of two or three words) with established acronyms (e.g, replace "BY THE WAY" with "BTW") of your choosing. This function must take only the string to be modified as an argument and must return the string with the replacements. You may not use any built-in find, replace, encode, or translate functions, but you may write your own version of these functions if you wish, and you may use the indexing operator (i.e., the square brackets), the slicing operator (i.e, the colon), the "in" operator, and the lenO function. . Write a function to replace at least different four words with established abbreviations (e.g., replace "PLEASE" with "PLZ" of your choosing. This function must take only the string to be modified as an argument and must return the string with the replacements. The restrictions (in terms of what you can and cannot user) are the same as with the previous item. Write a function to replace at least eight different letters with established single or double character homoglyphs (e.g., replace "K" with "