A 50-ohm air slotted line is used to measure a load impedance. Adjacent voltage minima are found at 20.2 cm and 28.7 cm from the load when the unknown load is connected and Vmax = 0:95 V and Vmin = 0:45 V. If the rst voltage minimum is located at 3.2 cm from the load and the velocity of wave propagation in the line is 3 108 m/s, determine: