Let p be "it is cold" and let q be "it is raining". Translate each of the following sentences into propositional logic.
a) It is not cold.
b) It is cold and raining.
c) It is raining or it is cold.
d) If it is raining, then it is not cold.
e) It is cold if and only if it is raining.
f) It is cold whenever it is raining.