The speed of sound at different temperatures

The speed of sound in air grows with the temperature: $v = (331 + 0.6T)\ \text{m/s}$, with $T$ in $^\circ\text{C}$. You will make the program find the speed at six temperatures, the time for sound to cross $1\ \text{km}$ on the hottest day, and the first temperature on the list at which sound goes faster than $340\ \text{m/s}$. Then it draws the speed against the temperature.

Your tasks.

1. Inside the loop, work out v, the speed of sound at the temperature T, in m/s.
2. Find t_hot, the time for sound to travel $1000\ \text{m}$ at the last (hottest) temperature, in seconds.
3. Find first, the first temperature on the list where the speed is more than $340\ \text{m/s}$.