c
h
o
o
s
e
f
u
n
c
t
i
o
n
x
(
x
+
1
)
/
2
2
x
/
2
a
8
b
3
s
h
o
w
c
a
l
c
u
l
a
t
i
o
n
s
8
×
3
=
2
4