2-(25pts)- a) Find the result of cos π + j0.5415 5415] -=0.7133-50.4013 4 b) Using the bilinear transform, design a digital Chebyshev LP filter with the following specifications amax = 2dB, amin = 24dB, fp = 4KHz, fs = 6KHz, fsmp = 14KHz. Do the following for the design: i) Find the filter order, ii) Find the corresponding analog filter transfer function, (at 2=0, |H(j)=1 or 1/√√1+2 depending on order n), iii) Find the digital filter. cosh(x) = ln(x + √√x²-1),sinh '(x) = ln(x + √√x² + 1)