A wave starts at point $a$, propagates $1 \mathrm{~m}$ through a lossy dielectric rated at $0.1 \mathrm{~dB} / \mathrm{cm}$, reflects at normal incidence at a boundary at which $\Gamma=0.3+j 0.4$, and then returns to point $a .$ Calculate the ratio of the final power to the incident power after this round trip, and specify the overall loss in decibels.