Chapter 3.5, Problem 7MC

For the given computation, answer the following questions.

$\begin{array}{l}\text{ 122}R\text{37}\\ 43\overline{)5283}\\ \underset{\_}{-43}\\ \text{ 98}\\ \underset{\_}{-86}\\ \text{ 123}\\ \underset{\_}{-86}\\ \text{ 37}\end{array}$

a. Why is the $1$ in the quotient above the $2$ in the dividend?

b. Why can we just bring down the $8$ to obtain $98$?

c. Why can we just bring down the $3$ to obtain $123$?

d. What does $\text{R}37$ mean?