You have a $10$ Mbps half duplex that has $2$ communication segements $16$

You have a $10$ Mbps half$-$duplex Ethernet network that uses two communication cable segments. In one cable of length $11,$ the signal speed is $v1={2\mathrm{.}5}^{***}{10}^{{?}^{{?}^{?}}}8\frac{m}{s}.$ In the second part of the network, the signal speed is v$2=2\mathrm{.}0**{10}^{{?}^{{?}^{?}}}8\frac{m}{s}.$ What is the allowable length of the second fragment to detect all collisions? There is no signal attenuation. ${}_4(10$ Points$)$

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