Answer:
1. The lowest point is 9 feet below sea level, and the highest point is 108 feet above sea level.
Step-by-step explanation:
The sea level is considered to be zero levels.
Now, the level +x feet means it is at x feet higher than sea level and the level -x feet means it is at x feet lower than the sea level.
Now, the lowest point of the country lies at −9 feet. The highest point of the country lies at +108 feet.
That means, the lowest point is 9 feet below sea level, and the highest point is 108 feet above sea level. (Answer)