A variable DC battery is connected in series with a 125- resistor and a p-n junction diode

Question:

A variable DC battery is connected in series with a 125-Ω resistor and a p-n junction diode that has a saturation current of 0.625mA at room temperature (20oC). When a voltmeter across the 125-0 resistor reads 35.0 V, what are?
(a) The voltage across the diode and
(b) The resistance of the diode?