im assuming this is about the difference between dual edge and quad edge elements. Can't see its logic vs pulse count. You could go leftfield and add alarmcom fuzzy logic ir220 into it
a. Ideally 13.69 but that is now 13.75 as most diag cant hit that resolution
b. Ohms law depends on the resistance and the distance. Resistivity is what matters. If the course is up to date id assume you discussed copper vs cca