python question

4. Function Two: countLetter Specification The second function you will write should be called countLetter'. Your function should take two (2) arguments. The first will be a string. The second will be a single character. The function should return one (1) integer: the number of times the character occurs in the string. Iesting: Create your own test cases. Think about what the edge cases are (e.g., what if the character is not in the string?)