can you explain question 4

4. The reaction A Products is a zero order reaction with a rate constant of 2.56103Ms. . If the concentration of A is 75.6 after 12.7 minutes, what was the initial concentration of A ? a. 838M b. 100M c. 75.6M d. 77.6M e. 73.6M For the reaction, A+2BC+2D, some measurements of the initial rate of reaction at varying concentration gave the following data. a. the rate law is therefore: rate =k[A]2[B]. b. the rate law is therefore: rate =k[A][B]2 c. the rate law is therefore: rate =k[A]2[B]2 d. the rate law is therefore: rate =k[A][B] (e) the rate law is therefore: rate =k[A][B]3