FM Radio Receiver
Welcome to PF, Misz.
As Ranger indicated, solutions to problems of an academic nature are not provided here. You will get guidance only. It isn't PF's mandate to solve people's problems, but to help them solve them on their own initiative. The exception to that is when someone with a real-life problem needs assistance to dispell it; then we brainstorm it.
Since this is a sore point with me, I will ask if the solutions are in your textbooks or course material?
This might be due to me being a baby-boomer, but it seems to me that lately a lot of test questions are beyond the scope of what has been taught. I never saw an exam question (or even pop quiz) that dealt with anything that we hadn't already covered in class.