Hi! I need help answering the following questions based on this function graph. Thanks in advanced!

EEII'DI" 1. Use what you know about derivatives to find the critical points of your roller coaster. You may use a calculator to find the x-values, but show the equationfexplain the steps you used. On what interva|s(s) is the roller coaster increasing? 2. Use what you know about derivatives to find the points of inflection of your roller coaster. You may use a calculator to find the x-values, but show the equationfexplain the steps you used. On what intervals(s) is your roller increasing at a decreasing rate? 3. What is the speed of the roller coaster halfway through the ride?