Solve the system of equations:
[a - 3b &= 13
5a + 6c &= 41
2a - 4b - c &= 5]

a) (a = 3, b = 4, c = 5)
b) (a = 2, b = 7, c = 3)
c) (a = 5, b = 2, c = 6)
d) (a = 1, b = 8, c = 2)