Directions: Answer these questions referring to the symbol-letter-number sequence given below:
7 2 A*3 K S Ϩ 5 M W $ 1 ß H ƴ 8 Z @ ∆ J F 9 P # £ X 4 C V 6 ? R

What is the total number of ‘the numbers immediately followed by a letter’ and ‘the symbols immediately preceding the letters’ together in the above sequence?

Some question is solved on the basis of certain system. On the same basis find out the correct answer from amongst.
a =12 (390) 8,  b=7(134) 5, c=5(?) 12