Looks like 3 questions, not 2. And you really must help us by explaining what you know how to do and showing some work that will guide a good answer for you. Otherwise, we just follow our own approaches and give answers derived from methods that remain mysterious to you. So write more, show work, etc. But since you are
not so sure about getting them wrong, here is Q2 done on a calculator I wrote many years ago. You can check that against your work result.