A gas is placed into a cylinder with a piston. The initial volume and pressure are $2\mathrm{.}00L$ and $8\mathrm{.}00$atm, respectively. The gas expands isothermally against a constant external pressure of $1\mathrm{.}75$atm to a final volume of $5\mathrm{.}50L.$

a$)$ Calculate the work $($in Joules$)$ for the process. Answer Only enter numerical values.

b$)$ Calculate the final pressure $($in atm$)$ of the gas. Answer Only enter numerical values.

For this calculation, assume the gas behaves ideally and the piston is weightless.