The question asks :
"Assume that diodes have voltage of 0.7 V and resistance 4Ω. Find the current through the forward and reverse bias of diodes. Draw the characteristic of diode through the given values."
My question is that how do I approach these type of questions and what "diodes have voltage of 0.7 V" means. Does that mean "the voltage drop" of each diode in the forward bias(I presume not in reverse bias)? Also, why do I need to know the resistance of the diodes since we know the voltage drops, and aren't the 4 ohms negligible compared to 1.5 K ohm?
In addition, can I thread the two diodes as one diode in reverse bias?