need help in understanding on how to solve the problem

Part 1 of 2 Construct a cumulative relative frequency distribution. Round your answers to three decimal places, if necessary. Cumulative relative frequency X Less than 13.5 Less than 17.5 Less than 21.5 Less than 25.5 Less than 29.5 Less than 33.5 Less than 37.5 Less than 41.5 Less than 45.5