need handwriting and work please

A general rule of thumb used by pilots is for every 1,000 feet of altitude, the temperature falls 3.5 F. a) Derive an expression for the temperature (F) as a function of altitude (ft). b) Using the expression derived in part a, derive an expression for the temperature in (C) as a function of altitude (m) c) If the temperature at sea level is 78 F. what would you expect the temperature to be at 10,000 feet in Celsius