Second order reaction/zero order reaction problems! please help if you can!?

Determine the concentration, in a second ordered reaction, of A after 1.0 min. The initial concentration of A is 2.134 M and the rate constant, k, is 0.111 M/s

also!

Determine the rate constant, k, of a zero ordered reaction. Initially, [A] = 2.103 M and after 45 seconds [A] = 1.203 M.
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