Submission: Submit the python or text file that contains all your answers to the submission folder for this lab by the end of the lab. To simplify Drew's (our tutor) work, please include your name and the number of the lab at the top of the file (if you're submitting a Python file, use comments: start the line with a #).
Grading: see the grading criteria for lab assignments.
Write a function double(x) that returns double the value of x. Use it in expressions to test it, e.g. double(10) + 3 should be 23.
Write a function month(n) that takes as input a number n between 1 and 12 and returns the name of the season, where numbers 1 to 3 are winter, 4 to 6 spring, 7 to 9 summer and 10 to 12 fall. Hint: you can use if/elif/else or a list (harder).