GPS data gives the position of a weather balloon, p as a function of t, relative to a weather station's roof in the following graph. Use the graph of the data to determine the time t when the rate of change is undefined. (10 points)

function graphed on coordinate plane consisting of multiple lines, first goes from 0 comma negative 1 to 2 comma 3, second goes from 2 comma 3 to 2 comma 1, third from 2 comma 1 to 4 comma 1, fourth from 4 comma 1 to 8 comma 2, fifth from 8 comma 2 to 8 comma 0, sixth from 8 comma 0 to 10 comma negative 1, seventh from 10 comma negative one to 10 comma negative 3, and last from 10 comma negative 3 to 12 comma negative 3

t = −2

t = 0

t = 1

t = 8