HW-Class-26: Problem 13 [2 points} Let x] = ln{x4 + 432) . Answer the following questions. 1. Find the intervas} on which 3\" is increasing. Answer n interval notation}: {UJNF} 2. Find the intervas} on which f is decreasing. Answer n interval notation}: {-Inf.} 3. Find the local maxima off. List your answers as points In the form (a. in). Answer (separate by commas}: 4. Find the local minima of f List your answers as points In the term (a. b]. Answer (separate by commas]: {0.0.6} 5. Find the intervas} on which 3\" is concave upward. Answer n interval mutation}: E. Find the intervas} on which 3\" is concave downward. Answer n interval notation}