for the common collector configuration shown i need to find the voltage gain.
The voltage gain formula is AV = (β+1)(r_o ll R_E)/(r_Π+(β+1)(r_o ll R_E)
But in the circuit R_E is absent . So how do we consider it ??
Nothing is given about the current source.

from the circuit theory i know that the internal impedance of a current source is very high (am i correct ?).

So in this case how do we relate it ?

thanks