In the following function defined by an equation in the form y = 5x^2 - 2x - 1, identify the values of a, b, and c.
a) a = 5, b = -2, c = -1
b) a = 2, b = -5, c = -1
c) a = -1, b = -2, c = 5
d) a = -1, b = 2, c = -5