The answer i wanna know the answer so i can figure out why that's the answer

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

What numbers are included in the set of integers? what numbers are not included?

Is the power produced directly proportional to the wind speed, give reasons for your answer?