Your question is 4-20mA Sensors and Redundant Power. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you design circuit solutions for 4-20 mA sensors, SI/PI for a multi-drop SPI network, and redundant power switch topologies?