A$)$ Create a script using substitution variables that allows a user to set a new cost amount for a book based on the ISBN.

B$)$ Execute the script and set the following values: isbn $=1059831198$ and cost $=$ $$20\mathrm{.}00.$

C$)$ Execute a command that undoes the change in Step C

D$)$ Delete Order# $1005.$ You need to address both the master order record and the related detail records.

E$)$ Copy the statements to your answer sheet