The graph shows the height in centimeters of a sunflower as a function of the time in days since germination. 100 80+ 60 Copader et al, Preparation for Cakuba, le, 0 2022 Macmillan Leaming Height in cm 40- 20 50 100 150 Time in days Over what (approximate) period is the graph concave up? (Give your answers as an intervals in the form (*,*). Use the symbol co for infinity, U for combining intervals, and an appropriate type of parenthesis "(",")", "I"," [","I" depending on whether the interval is open or closed. Enter @ if the interval is empty. Approximate the period using whole numbers.)approximate period over which the graph is concave up: What is happening to the growth rate of the flower over the period where the graph is concave up? It is constant over this period. It is increasing over this period. O It is decreasing over this period