Help with question please!

A data set with a lot of data points has a bell shape and has an average of 100 with a standard deviation of 20. About what percent of the data will be between 80 and 120? Answer in the form X% where X is a number. About what percent of the data will be between 60 and 140? About what percent of the data will be outside of 80 to 120? About what percent of the data will be outside of 60 to 140? About what percent of the data will be above 120