Need help with practice problem

(b) The voltage V in a simple electrical circuit is slowly decreasing as the battery wears out. The . . . . . V re31stance R is slowly 1ncreasmg as the re31stor heats up. Use Ohm's law: 1 = , to nd the R exact rate at which the current I is changing at the moment when R = 200 Q , V = 50 V , dV = 0.5 V/s , and dR :l Q/s (Note: Resistance is measured in Ohms which is dt dt abbreviated Q. Voltage is measured in Volts which is abbreviated V . Current is measured in Amperes which is abbreviated A .)