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A trasmission line with a characteristic impedance of $100\:\Omega$ is used to match a $50\:\Omega$ section to a $200\:\Omega$ section. If the matching is to be done both at $429\:MHz$ and $1\:GHz$, the length of the transmission line can be approximately

1. $82.5\:cm$
2. $1.05\:m$
3. $1.58\:m$
4. $1.75\:m$