(20 Points) Problem 1: The magnetic vector potential at point P (r,0,4) due to a small antenna located at the origin is given by: 50e-jẞr A 2 r Determine the following in Far Field: a) The electric and magnetic fields (E, H) in polar form. b) Calculated the time average power density Wav. c) the total radiated power Prad. d) The maximum radiation intensity Uo. e) the maximum directivity Do. f) HPBW & FNBW