Consider the parametric curve: I = 4-12 y = P-4t At which t value(s) is the tangent to this curve vertical? ( Note: If there is more than one write them as a comma separated list) Write the point(s) at which the tangent is vertical.( Note: If there is more than one write them as a comma separated list, e.g. (1,2),(3,4) At which t value(s) is the tangent to this curve horizontal? ( Note: If there is more than one write them as a comma separated list). t Write the point(s) at which the tangent is horizontal. ( Note: If there is more than one write them as a comma separated list, e.g. (1,2).(3,4 Use a graphing device to graph the curve and check your work