c
o
s
t
c
u
r
v
e
s
p
a
r
a
m
e
t
e
r
s
a
1
0
.
5
a
2
1
b
1
1
b
2
0
Q
4
C
(
x
)
C
(
y
)
x
=
2
.
7
0
y
=
1
.
3
0