1 Below is a chart that gives some information regarding a twice differentiable function fx The n a in the chart means not applicable x 4 x 4 4 x 0 x 0 0 x 4 x 4 4 x n a n a 1 n a 5 n a negative 0 positive 0 negative 0 positive n a f x x Concavity 3 n a n a Fill in the last row of the chart the four empty spaces with the proper concavity either concave up or concave down and then sketch a graph that satisfies all the conditions in the chart