i. ( a/2 - 9a + 20 = 0 ), ii. ( 2b/2 - 5b - 12 = 0 ). Solve both the equations to find the relation between ( a ) and ( b ).

a) ( a = -8b + 40 )
b) ( a = 8b + 40 )
c) ( a = 8b - 40 )
d) ( a = -8b - 40 )