Erin made a line plot of the amount of time she practiced shooting free throws each day in the past 10 days. Line plot named as ALTDCTime Spent Practicing (hours)ALTDC shows a number line from one-fourth to two and one-fourth. The number line is divided into 8 equal parts. 1 dot on one-half, 2 dots on three-fourths, 3 dots on 1, 2 dots on one and one-fourths, 1 dot on one and half and 1 dot on 2 is given.

Part A
What is the difference between the greatest and least times Erin practiced shooting free throws?