An antenna array with four elements separated by d=la/4 (where la is wavelength) is used for angle of arrival detection. The transmissions can only occur from one of two fixed locations: Location 1 at angle phi1=40 degree and Location 2 at angle phi2=80 degree, both located very far from the antenna array. a/ Compute the steering vectors s(phi1) and s(phi2) for the two transmitter locations b/ Suppose the received signal is y=[y1 y2 y3 y4]=[e^0.1j e^1.2j e^2.5j e^3.6j] Compute the correlation between the steering vector and the received signal. c/ Determine the transmitter location