Design a 19-element uniform linear scanning array with a spacing of lambda/4 between the elements. (a) What is the progressive phase excitation between the elements so that the maximum of the array factor is 30 degree from the line where the elements are placed? (b) What is the half-power beamwidth (in degrees) of the array factor of part a? (c) What is the value (in dB) of the maximum of the first minor lobe? Verify using the computer program Arrays of this chapter