Let f(x) = x_{2} + b_{1}x + c_{1} , g(x) = x_{2} + b_{2}x + c_{2} , α , β be real roots of f(x) = 0 and α + δ , β + δ be real roots of g(x) = 0, minimum value of y = f(x) be - 1/4 and minimum value of y = g(x) occurs at x = 7/2.

**The value of b**_{2} is

(A) 6

(B) -7

(C) 8

(D) 7