Kindly provide a COMPLETE and CLEAR solution.
Extracted text: 24. A thermometer reading 10°C is brought into a room where the temperature is 32°C. Two minutes later the thermometer reading is 15°C. Determine the temperature reading 5 minutes after the thermometer is first brought into the room. a. 21.96°C b. 21.46°C c. 20.46°C d. 20.96°C