The input to a communications receiver is r(t) = 5 sin(20t + 7 /4 ) + (t)

The input to a communications receiver is

r(t) = 5 sin(20πt + 7 /4 π) + ¡(t) + n(t)

where

i(t) = 0.2 cos (60πt)

and n(t) is noise having standard deviation σ_n = 0.1. The transmitted signal is 10 cos(20πt). Determine the SNR at the receiver input and the delay from the transmitted signal to the receiver input.