Assume That the Customer Master File and the Transaction File $\begin{array} { l l } \text { Master file } & 3,7,23,76,79,99 \\\text { Transaction file } & 3,4,23,23,7,76,99\end{array}$

Essay

Assume that the customer master file and the transaction file consist of the record numbers shown in the following sequence:
$\begin{array} { l l } \text { Master file } & 3,7,23,76,79,99 \\\text { Transaction file } & 3,4,23,23,7,76,99\end{array}$
The record number 99 denotes the logical end of the file.The program processes records in ascending order.
Required: On the lines below,indicate the numbers of records affected as described.
a.Master records which were updated ________
b.Master records which were not updated ________
c.Transaction records which were posted ________
d.Transaction records which were not posted (an error condition)________