PART A)
Equivalent resistance in series is given as

now we have


PART B)
Here in order to find the current in the circuit we can use ohm's law

here we have
V = 24 Volts
R = 23 ohm


PART C)
Now in series circuit all branches of resistance connected to each other
so here no division of current
hence current in all resistors will be same
so we have
