Power density spectrum of the binary fsk signals

Question

Response to the following problem:

Determine the power density spectrum of the binary FSK signals in which the waveforms are

S_i(t)= sin ω_it ,   i = 1, 2  ,       0≤t≤T

where ω₁ = nπ/T and ω₂ = mπ/T, n = m, and m and n are arbitrary positive integers. Assume that p₁ = p₂ = ½.

Sketch the spectrum, and compare this result with the spectrum of the MSK signal.