In a reaction, $x+YZ$

Suppose that a solution initially containing $2$mol.$I^{-1}{?}^{-1}x$ and $1mol{I}^{-1}$ of $Y$ is allowed to react. The rate constant for the reaction is $0\mathrm{.}004M^{-1}{s}^{-1}.$ Calculate the amount of $Z$ at time $65s.$ Give your answer to $2$ significant figures.