Determine the characteristic impedance of: a) a parallel wire line with D/d=5 (the dielectric material has 4 and u, = 1.0005 = b) a coaxial line with dielectric material that has = 4 and u, = 1.0005 c) two parallel plated with width of 8 mm and a height of 2 mm with dielectric material that has = 4 and u,= 1.0005 d-Determine the normalized propagation velocity of parts b and c