Please help me understand how to fill in the values

Problem 1: Using the diagram below determine the (A) the equivalent resistance (B) current in the circuit (in mA) and (C) the potential drop across the RA := 10.0. 1, RB:=40.0 3, and Ro:=120.0 0 resistors. 10.0 0 40.0 0 120.0 0 V bat := 10.0 . V Reg:= RA+ RB + Ro=170 0 10.0 V V bat I tot = =58.82 mA Reg VAI tot . RA=0.59 V VB= Itot . RB=2.35 V Vo:=Itot . Ro=7.06 V