get the R$-134$a values from the thermodynamics tables and give me a final answer

A spherical balloon contains $1\mathrm{.}5$ kg of R$-134$a at $5\backslash$deg C$,30\%$ quality. This system is heated

until the pressure in the balloon reaches $1$ MPa. For this process, if the pressure in the

balloon is directly proportional to the balloon diameter $($ P $=$ c D $,$ c $=$constant, D $=$ diameter$)$

$1-$ Show that the relation between P & V is polytropic process and find the value of n

$2-$ Calculate the work and heat transfer for the process