3.2) I made an equation for the input voltage and input current
Vi = Vs*(Zi)/(Zi+Rs+Rm)
Ii = Vs/(Zi+Rs+Rm)
I am a bit confused about what voltages V1 and V2 are measuring, and what do they mean by using the phase ?, I don't know the phase
3.3) After some research I found this equation for a twisted pair cable
Though i'm not sure what to use for Er. On the site it says
εR=(c/v)^2
but I don't know the velocity of the signal
http://www.sigcon.com/Pubs/edn/TwistedImpedance.htm