A weather board at a seaside town shows temperatures in °C. Many visitors read °F, so the board needs a second line.
To turn one temperature from °C into °F, multiply it by 9, divide by 5, then add 32.
Task: write to_fahrenheit(celsius). celsius is a list of temperatures in °C. Return every temperature in °F, as a plain list, in the same order. Round each value to 1 decimal place.
There is always at least one temperature.