Suppose f is increasing on the interval [a, b] and we want to estimate the area under the curve on this interval. 1. If f is concave down on this interval, using left endpoints would give [ Select ] 2. If f is concave down on this interval, using right endpoints would give [ Select] 3. If f is concave up on this interval, using left endpoints would give [ Select ] 4. If f is concave up on this interval, using right endpoints would give [ Select] 5. If f is not known to be increasing or decreasing on [a, b], which of the above statements must be true? (Select]
