Find the open intervals on which the function $f(x)=-5x^2+4x+9$ is increasing or decreasing.

Note: Use the letter U for union. To enter $,$ type the word infinity.

If the function is never increasing or decreasing, enter NA in the associated response area.

increasing: $$

decreasing: $$

Find the local maximum and minimum values of the function $f(x)=-5x^2+4x+9.$

Enter your answers in increasing order.

If there is just one local maximum or minimum value, then in the second row below enter NA as the answer for $"x="$ and select NA in the "there is$"$ drop$-$down menu.

If there are no local maximum or minimum values, then in both rows below enter NA as the answer for $"x="$ and NA in the "there is$"$ drop$-$down menu.