Let the maximum unambiguous range for a low PRF radar be \(R_{\max }\). (a) Calculate the SNR at (1/2) \(R_{\max }\) and (3/4) \(R_{\max }\). (b) If a target with \(\sigma=10 \mathrm{~m}^{2}\) exists at \(R=(1 / 2)\) \(R_{\max }\), what should the target RCS be at \(R=(3 / 4) R_{\max }\) so that the radar has the same signal strength from both targets?