Nyakocchi

Hi! My AP Chem teacher assigned me a set of problems, and this problem in particular is giving me problems. I'm not asking anyone here to completely solve the problem, I know the rule about that. If at all possible, can someone tell me how to start it off? Thanks! Consider the reaction 3A + B + C ---> D + E Where the rate law is defined as An experiment is carried out where 0 = [C]0 = 1.00M and [A]0 = 1.00 X 10-4M. If after 3.00 min, [A] = 3.26 X 10-5M, calculate the value of k.