What is the equivalent gain in dB of the following magnitudes?
(i) $\left|G_1\right|=0.1$
(ii) $\left|G_2\right|=+10$
(a) $-20 \mathrm{~dB},+10 \mathrm{~dB}$
(b) $+1 \mathrm{~dB},+20 \mathrm{~dB}$
(c) $-10 \mathrm{~dB},+10 \mathrm{~dB}$
(d) $-20 \mathrm{~dB},+20 \mathrm{~dB}$