What have you done so far please? You must know something from your text or classroom notes to at least be able to start on these. If you can do this you can be better helped as we see where you have gone right or wrong. Sometimes, in fact many times a student will have difficulty not because of what is being done now, but from what was not learned before. I've seen some minor miracles when people put in initial effort themselves as they become proud of what they CAN do and thought they couldn't.
I'll help get you started: The surface area of a cylinder is two circles at the top and bottom [if the are included] and the outside surface. The last is found by opening up to form a rectangle. One side will be the height of the cylinder, and the other its circumference. Can you find those dimensions to get started? Can you find the area of a circle, and of a rectangle?