The replacement set is 
Replace a in
with each value in the replacement set
and check whether the inequality is true or not. \
| \
a \ | \
\
| \
\
True or false \ | \
| \
3 \ | \
\
| \
\
False \ | \
| \
4 \ | \
\
| \
\
True \ | \
| \
5 \ | \
\
| \
\
True \ | \
| \
6 \ | \
\
| \
\
True \ | \
| \
7 \ | \
\
| \
\
True \ | \
The solution set is
.