Answer:

Step-by-step explanation:
Let's use Shockley ideal diode equation which relates the current intensity and the potential difference:

Where:

Thermal voltage at any temperature it is a known constant defined by:

Where:

(a)
Using the data provided:

(b)
Using the data provided and Shockley ideal diode equation

(c) Let's isolate
from Shockley ideal diode equation:


Finally, using the data provided:
