Which letter code did Koeppen use for following temperature ranges 3 marks Average te...........

Which letter code did Koeppen use for following temperature ranges?      (3 marks)

1. Average temperature of the coldest month is 18° or higher.
2. Average temperature for all months is below 10° C.
3. Average temperature of the coldest month is -3° or lower.
4. Average temperature of the coldest month is higher than -3° but less than 18°.