A 0°-inclination LEO satellite will use TDRS (at geostationary orbit) to regularly communicate at S-band (assume 2.2 GHz) to Earth. The satellite orbits at an altitude of 400 km. What minimum tracking bandwidth must the TDRS receiver possess in order to accommodate the Doppler effect? (Hint: you need to include both the velocity of the LEO satellite and the velocity of the GEO satellite. To the LEO satellite, the GEO satellite is not standing still.)