Using plancks law evaluate the stefan-boltzmann constant

Question

using planck's law

(a) show that it reduces to the Rayleigh-jeans law in the limit as ^ gets large

(b) show that it reduces to wien's law in the short wavelenght limit. Evaluate a and b.

(c) Evaluate the Stefan-Boltzmann constant.

(d) Evalute the constant in the wien displacement law.