4) You are on a rollercoaster, and your path is modeled by a vector function r(t), where t is in seconds, the units of distance are in feet, and t = 0 represents the start of the ride. Assume the axes represent the standard cardinal directions and elevation. Explain what the following represent on the ride, being as specific as possible (these are all pretty standard roller coaster shapes/ behaviors): a. r(0) =1(120) The roller coster had a complete one round. b. For 0 St - 25, N(t) = 0 It is the lowest point of the circlex c. 17' (20)1 = 100 The distances from the starting point X d. r(20) = (a, b, 10), r(22) = (a, b + 5, 100), r(24) = (a, b + 10, 10). T(20) and T(24) are pointing in the positive x, T(22) is pointing in the negative x. e. For 40