\text { If } y=e^{-0.6 x}(3 \cos (0.8 x)-2 \sin (0.8 x)) \text { is the solution of the following } 2^{\text {nd }} \text { order equation: } \mathrm{A} \frac{d^{2} y}{d x^{2}}+6 \frac{d y}{d x}+\mathrm{B} y=0 Find the constants A and B?