The equivalent resistance of the series combination is
The equivalent resistance of the parallel combination and hence circuit is given by,
If the key in the circuit is closed then only the current will flow
Total current is given by
(i) As the circuit is in parallel combination, the current gets divided into the branches in ratio with the resistances
So the current in the branch AB is
The current in the branch AC and CDE are same as they are in parallel
(ii). As the circuit is in parallel connection the potential difference across AB and CE are the same
VAB = 1.5 V
Now the potential difference across CD and CE is proportional to the resistances, so
VCE = 0.6 V