$-1)$ Express $\backslash (\backslash$mathrm$\{$Pin$\}=3\backslash$mathrm$\{$~W$\}\backslash )$ in decibels as both dBm and dBW$.$

$-2)$ In the figure below

Calculate the required input power in dBm that will provide $20$ Watts of output power. Amplifier $\backslash$#$1$ Gain $=+20$dB

Cable Attenuation$/$ Loss $\backslash (=-10\backslash$mathrm$\{$~dB$\}\backslash )$

Amplifier $\backslash$#$2$ Gain $\backslash (=+6\backslash$mathrm$\{$~dB$\}\backslash )$

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