1.1. The equation from Kepler’s third law is given below: 

      T² = $\frac{4{ \pi }^{2}{r}^{3}}{GM}$

Explain what each symbol in the equation represents.

1.2. State the time period for any geostationary satellite orbiting the Earth.

1.3. Use the following data to show that the orbital radius of a geostationary satellite is 4.22 × 10⁷ m: 

Gravitational constant, G = 6.67 × 10^–11 N m² kg^–2

Mass of the Earth, M_E = 5.97 × 10²⁴ kg

1.4. Hence, calculate the height of a geostationary satellite above the Earth’s surface.