I'm confusion, can I please get help???

How does the space charge width change with forward and reverse bias? also, calculate the space charge width for a reverse bias of 4v on a silicon pn junction at t = 300k and doping concentrations of na = 5x1015cm-3 , nd = 5x 1016 cm-3 .

How do you tell if someone actually cares about you? and just say they do?

The material that keeps its new shape after it is stretched is called?