A PART 2: Complete the following Questions Complete the following Questions: 1 . Th The graph shows a bicyclist's elevation above sea level. 8 Height (m) At which point(s) is the IROC equal to zero? 4- What does this mean for the bicyclist? [3A] 4 8 12 16 20 Time (s) 2. The height, in metres, of a toy rocket above the ground can be modelled by the function h(t) = -5t2 + 50t, where t represents the time in seconds. a) Determine the AROC between the times t = 2 and t = 4. [2A] b) Use the difference quotient to calculate the IROC at t = 5. [3A]