For 6 and 10: Use a graph to estimate the open intervals on which the functions is increasing or decreasing. Then find the open interval ls analytically. For 16: Find the open interval on which the function is increasing or decreasingFor 24-30: Find the critical numbers of f, is any, and find the open intervals on which the function is decreasing or increasing. Then, apply the First Derivative Test to identify all relative extrema.