Write the given second order equation as its equivalent system of first order equations. u" - 8u 4.5u = -3 sin(3), u(1) = 6.5, l (1) = 8 Use v to represent the "velocity function", i.e. v = d (1). Use v and u for the two functions, rather than u(t) and v(t). (The latter confuses webwork. Functions like sin(t) are ok.) Now write the system using matrices: d V and the initial value for the vector valued function is: u(1) v(1)