Answer:
A)

B)

Step-by-Step Explanation:
A)
We want to determine tan(C).
Remember that tangent is the ratio of the opposite side to the adjacent side.
The opposite side according to Angle C is 12.
And the adjacent side is 10.
Therefore:

B)
We want to determine tan(X).
Again, according to Angle X, the opposite side is 5.
And the adjacent side is 11.
Therefore: