Please help

MY NOTES ASK YOUR TEACH Consider the following. n(t) 3 2 A 6 8 10 -2 (a) Identify the graph as concave up or concave down. concave up O concave down (b) If the graph shows a change in direction, estimate the input value corresponding to the maximum or minimum output value. (If an answer does not exist, enter DNE.) t = (c) Indicate the input interval over which the function is increasing and the input interval over which the function is decreasing. The function is increasing over 0