Refer to the following letter, number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) 4 @ 6 K & 2 R G C & T % 7 D Y # 3 5 E * S (Right)
How many such symbols are there which are immediately preceded by a letter and also immediately followed by a number?
1
5
2
4
3
3
4
2