Fixed bug in problem 2 and implemented problem 3 added tests for problem 3
Updated for problem 4 and 5
added solution for problem 6
added solution for problem 7
added solutions for problem 8, 9a, 9b, 9c
Fixed but in all_answer and added tests for all answer as well
added solution for problem 10 and a few more tests.
fixed name of all answers. added partial solution for problem 11

Case for tuple, tuplep needs to be implemented.
Added case for problem 11 tuple case and tests to confirm
Added problem 12 and test cases.

This is what was sumbitted.
Added answer to test case c12