For the following first order gaseous reaction

The initial pressure in a container of capacity $\mathrm{V}$ litres is $1 \mathrm{atm}$. Pressure at time $\mathrm{t}=10\sec$ is $1.4 \mathrm{atm}$ and after infinite time it becomes $1.5$ atmosphere. Find the rate constant ${\mathrm{k}}_1$ and ${\mathrm{k}}_2$ for the appropriate reactions.