[填空题]
The area, A, of a given sqo kma3 5-muhz/ +xaak*uare can be re5jk77+ht;gz )4cjhr wyq7to gpresented by the function
A(P)=$\frac{P^2}{16}$,P≥0,
where P is the perimeter of the square.
The graph of the function 0≤P≤20, is shown below.
1.Find the value of A(20).
2.On the grid above, draw the graph of the inverse function, $A^{−1}$.
3.In the context of the question, explain the meaning of $A^{−1}$(4)=8.
