Please perform the following using matlab

Matlab function polar () can be used to plot data in polar coordinates instead of rectangular coordinates. The general format for the function is polar (theta, r, 'LineSpecifiers') where theta is a vector of angles in radians and r is a vector of distances (magnitudes). A grid will be automatically generated in polar plot. a) Make a polar plot for the function r = 3 cos^2 (0.5 theta) + theta for 0 lessthanorequalto theta lessthanorequalto 2 pi. b) The gain G of a certain microwave dish antenna can be expressed as G(theta) = |sin c(4 theta)| where - pi/2 lessthanorequalto theta lessthanorequalto pi/2 is the angle in radians from the boresight of the dish, an sinc function is defined as sin c(x) = sin x/x. Plot G (theta) vs. theta on a polar plot with title "Antenna Gain vs. theta