Suppose a particle moves in the xy-plane in a line from (5,2) to (1,9) in one time unit. Express the path of the particle in each of the following ways: (a) Write parametric equations. Enter your answer as a comma-separated list of equations in terms of t. (b) Write a vector valued function in the form r(t) - x(t)i + y(t)j r(t) (c) Write a vector valued function in the form r(t) - a + bt. r(t) -