Answer
Please see the work below
Work Step by Step
The rate law for the given reaction is,
$$ Rate = k_0[A]^0 = k_0 $$
Where $k_0$ is the rate constant of zero order reaction
Unit of $k_0$ will be $molL^{-1}s^{-1}$
The plot of rate of the reaction vs concentration of $A$ is given below
