a$.)$ Use a multiple$-$line comments in the executable section explain the purpose of the code.

b$.)$ Declare $4$ variables, d$\_$length, d$\_$width, d$\_$height and d$\_$volume as number. When you

declare the length, width and height use substitution variables to assign values like the

example below:

d$\_$length NUMBER :$=$ &q$\_$length;

c$.)$ Calculate the volume using the formula: volume $=$ length $*$ width $*$ height