Help please ! If someone who is 5ft tall uses a catapult to shoot a potato in the air at 100ft per second, we can use the function below to calculate how high up the potato will be from the ground at any time (x representing the seconds).

f(x) = -16x2 + 100x + 5

1. Explain what f(1) means in this context

2. Find the value of f(1)

3. What does f(x)=0 mean in this context

4. What maximum height will the potato reach?

5. What time will the potato be at its maximum height?