For the reviewing population, this might help your studies before the environmental planning boards. My coaching session for PIEP Cebu this 2019 entailed exercises for the students, so I’m sharing them here, so you can practice.
The presentation below is downloadable through Slideshare. Also, you can play around with the data in the tables and create your own exercises for projection. Basically you can download tables off the Philippine Statistics Authority for more datasets.
Make sure you know how to use your calculator symbols before taking the exam! Good luck, and God bless. 🙂