c
a
r
p
o
s
i
t
i
o
n
s
h
o
w
s
o
l
u
t
i
o
n
s
h
o
w
t
a
i
l
l
i
g
h
t
s
s
h
o
w
m
a
t
h
e
m
a
t
i
c
a
l
b
a
c
k
g
r
o
u
n
d