Please need an answer asap

Write the given second order equation as its equivalent system of first order equations. thu" - 3.5tu' + (t2 + 2.5)u = 4.5 sin(3t) Use v to represent the "velocity function", i.e. v = u'(t). 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: at [: ]- 188 1 (:1 . 18]