What is the mean of 10 15 20 and 25

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?

Answer pls man im trying to get out of summer school

Use the given information to determine the exact trigonometric value.