Question

A group of numbers/symbols is coded using letter codes as per the codes given below and the conditions which follow. The correct combination of codes following the conditions is your answer.
Number/ symbol
3
@
7
5
$
&
2
%
#
9
+
6
8
4
Code
C
F
A
J
L
E
W
Q
D
G
R
B
U
S
Conditions:
(I) If the first element is a symbol and the last element a number, the codes for these two (the first and the last elements) are to be interchanged.
(II) If both second and third elements are perfect squares, the third element is to be coded as the code for the second element.
What will be the code for the following group?
@ 2 # 6 9