i need help with these questions. please show working for them of them so that i can practice

Calculate the reaction rate when [A]=0.00395M and [B]=0.00235M. The rate iaw for the reaction 2A3B+2C is first order in A. If the rate constant for this reaction is 0.0130s1, what is the rate of reaction when [A]=0.800M ? The decomposition reaction A3B+2C is a second-order process. If it takes 1s for the quantity of A to decrease from 0.0700mol to 0.0682mol, what is the half-life of this reaction? The following data were measured for the reaction A+3B3C