10.00 is applied across three resistors in series and a current of 1.00mA is recorded by the ammeter

10.00 is applied across three resistors in series and a current of 1.00mA is recorded by the ammeter in the circuit. A voltage of 4.50V is measured across the first resistor R1 and a voltage of 2.20V is measured across the second resistor R2. Use Kirchoff`s law to determine the resistance of third resistor R3.