I don't blame them.
The total voltage across some resistors connected in series is equal to the sum of the voltages across each resistor in series.
For example, the voltage across R2 is 1.2V and the voltage across R3 is 1.2V, therefore the voltage across both R2 and R3 is 2.4V which is also equal to the voltage across R2.
Message to anyone thinking about posting the answer.
PLEASE DO NOT POST THE ANSWER. Let him figure it out for himself because it will help him more.