E$,$ K$,$ G$,$ v

A metal specimen with $20mm$ and $100mm$ length is loaded elastically with $5kN$ and elongates $0\mathrm{.}8mm.$

Its diameter under this load is $19\mathrm{.}95mm.$ Calculate:

a$)$the Bulk Modulus, K;

b$)$the Shear Modulus, G$.$