If you want more help, you have sit for quiz now:
Write answer to the following questions after reading the sketch of Post-13.
1. Have you uploaded the sketch of Post-13? Is it working? If so, post the readings of the Serial Monitor.
2. Tell us the names of the Libraries that have been used in Post-13.
3. What is the difference between float data type and int data type?
4. More questions are coming once you have answered to the above questions.