In the previous problem, assuming that you may be able to use the small grazing angle approximation. 

(a) Calculate the ratio of the direct to the indirect signal strengths at the target. 

(b) If the target is closing on the radar with velocity \(v=300 \mathrm{~m} / \mathrm{s}\), calculate the Doppler shift along the direct and indirect paths. Assume \(\lambda=3 \mathrm{~cm}\).