The function latex: f\left(x\right)=-x^2+4 f ( x ) = − x 2 + 4 defined on the interval latex: -8\le x\le8 − 8 ≤ x ≤ 8 is increasing on the interval latex: \left[a, b\right] [ a , b ] and decreasing on the interval latex: \left[c, d\right] [ c , d ] . fill in the blanks below.