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In January, the ratio of the number of male to female tailors in a garment factory was 4 : 3.

The following month, 80 more female tailors joined the factory.

Then, the ratio of the number of female to male tailors became 2 : 1.

(a) How many male tailors were there in January?

(b) How many female tailors were there in the end?

Notes to students:

If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12