Answer:
a) All ammeters will have the same reading because they are in series and the current is continuous around the circuit - consider water flowing in a circuit - if no water enters or leaves (except at the battery) the current must be continuous around the circuit.
b) The circuit with the fewest resistances must have the highest reading because the net resistance if the circuit is smallest
The circuit with the most resistances will have the smallest current
I = V / R must be satisfied and all items in these circuits are in series