Find the general solution of the equation 4 d²y/dt² - dy/dt + y = 0.
a) y = C1 e(²ᵗ) + C2 e(⁻ᵗ)
b) y = C1 e(⁻²ᵗ) + C2 e(ᵗ)
c) y = C1 e(ᵗ) + C2 e(⁻²ᵗ)
d) y = C1 e⁻ᵗ + C2 e(²ᵗ)