What is the chemical formular for germanium tetraiodide

Iwill give extra points to who gets this right

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?