Solve Write a Mixed Numeral for the Answer $x$ In the Figure

Multiple Choice

Solve. Write a mixed numeral for the answer.
-Find the length of the section represented by $x$ in the figure.

$\mathbf{a}=2 \frac{3}{4}$
$\mathbf{b}=13 \frac{5}{12}$

A) $7 \frac{11}{12}$
B) $19 \frac{7}{12}$
C) $13 \frac{5}{12}$
D) $8 \frac{1}{12}$