Create a function that will test if a string is a valid PIN or not via a regular expression. A valid PIN has: • Exactly 4 or 6 characters. • Only numeric characters (0-9). • No whitespace. Examples validate("121317") validate("1234") → true validate("45135") → false validate("89abc1") validate("900876") → true validate(" 4983") → false → true → false

Complete the rotate_text() function that takes 2 parameters, a string data and an integer n. If n is positive, then the function will shift all the characters in data forward by n positions, with characters at the end of the string being moved to the start of the string. If n is 0 then the text remains the same. For example: rotate_text('abcde', rotate_text('abcde', rotate_text('abcde', 1) would return the string 'eabcd' 3) would return the string 'cdeab' 5) would return the string 'abcde' rotate_text('abcde', 6) would return the string 'eabcd' ... and so on. If n is negative, then the function will shift the characters in data backward by n positions, with characters at the start of the string being moved to the end of the string. For example: rotate text('abcde', -1) would return the string 'bcdea'

python3 program : Write a function that removes all spaces from a given string string and returns the new string.

please code in pythonis_phone_num: This Boolean function takes a string and returns True if it is in the formatddd-ddd-dddd, where d is a digit, False otherwise. Example calls:is_phone_num('123-456-7890') --> Trueis_phone_num('123-4556-7890') --> Falseis_phone_num('(123)456-7890') --> False

An 'expression' in programming is... * O any code that performs an operation using a single operator. O any code that is written on a single line. O any code that evaluates to a singular value. any code that calls a function.