Q1.What is global interpreter lock? Q2.# Write a Python program that takes a list of integers and returns a new list with each integer squared. However, if the squared value is greater than 50, replace it with the string 'Over 50'. The program should handle any exceptions that may arise from incorrect inputs gracefully without using inbuilt functions. # input_numbers = [1, 7, 8, 4, 'a', 3] # Output - [1, 49, 'Over 50', 16, 'Invalid input: Not an integer', 9] Q3.# Given a string, find non-repeating character in it and return its index. If it doesn't exist, return -1. # input='leetcode # output=['l','t','c','o','d']