Which of the following equations represents f''(x) if f(x) =x⁷-x⁵+e³-x+eˣ
a) 42x⁶-20x⁴+3e²-eˣ
b) 42x⁶-20x⁴+3e³-1+eˣ
c) 7x⁶-5x⁴+3e²-1+eˣ
d) 7x⁶-5x⁴+3e³-x+eˣ