In a directional antenna GML (gain of the main lobe), Gsi (gain of the side lobe), and FBR (front-to-back ratio), are defined as follows: SML GML = Siso SL. %3D GSL. FBR = GML Siso GSL One may also define a k factor as the ratio of the side lobe area (As) and main lobe area (As) and main lobe area (AML). It can be shown that k is related to GuL and GSL as GML -1 ASL k = 1- GsL AML For a particular antenna, it is given that FBR = 40 dB and k = 1110. a) Obtain GML in dB." b) Obtain GS in dB.