If  P-N junction  diode is connected in forward bias at 1.5V  then  40 mA  and  at 2V -60 mA   of current  are passing. If  some P- N  junction diode is connected in reverse bias at  2V  then 0.0 μA  and at 4v - 0.2 μA  of current  is passing then calculate  resistance of diode in  forward bias and reverse bias