Writing 4 very short and basic python programs

1. Shorten-string Write a function that shortens a string by removing characters that fall at prime number locations. Use accompanied tests to verify the correctness of the solution. The following describes input to the function and output: - First parameter is a string (e.g., 'abcd') - Second is a number representing the prime upper limit (e.g., 4) - The sample output would be 'ad' because 2 and 3 are prime numbers, meaning 'bc' is removed. 2. Pattern Write a function that takes four inputs to generate a pattern. Use accompanied tests to verify the correctness of the solution. The following describes input to the function: - First input is the choice of characters (e.g., *) used in pattern generation - Second, maximum pattern length (e.g., 2) - Third, separation (e.g., 'newline’) - Fourth: half (e.g., both i.e., full symmetry) - Output * ** * 3. Alter-string Write a function that takes two inputs, performs word reversal at each occurrence, and reverses the whole string. Use accompanied tests to verify the 2 correctness of the solution. The following describes input to the function and output: - First input is a string (e.g., 'Hi I am great') that needs reversing. - Second is an integer that describes each occurrence for the reversal (e.g., 2) - The output will be, where every third word is reversed, followed by complete string reversal: 'Taerg am i hi' 4. Email-and-numbers Match email addresses and digits. Use accompanied tests to verify thSe correctness of the solution. The following describes input to the function and output: - Input string (e.g., 'Mr Abc abc at tudublin dot ie contact 1212-21' - Output string (e.g., [(