A parallel plate geometry was used to measure the dynamic rheological properties of a

polymer melt at $190C.$ The applied sinusoidal strain and corresponding stress curves at an

angular frequency of $10s^{-1}$ are given in the following graph. Calculate the following

viscoelastic properties of the polymer melt at an angular frequency of $10s^{-1}.$

a$.$ Phase angle

b$.$ Storage modulus

c$.$ Loss modulus

d$.$ Complex modulus

e$.$ Complex viscosity