Find the transition points. y = 15x³ + 360x² (Use symbolic notation and fractions where needed. Give your answer in the form of a comma separated list) X = Find the interval(s) of increase. (Use symbolic notation and fractions where needed. Give your answer as interval(s) in the form (*, *). Use the symbol ∞o for infinity, U for combining intervals, and an appropriate type of parenthesis "(", ")", "[", "]" depending on whether the interval is open or closed. If the interval does not exist, enter Ø). XE Find the interval(s) of decrease. (Use symbolic notation and fractions where needed. Give your answer as interval(s) in the form (*, *). Use the symbol co for infinity, U for combining intervals, and an appropriate type of parenthesis "(", ")", "[", "]" depending on whether the interval is open or closed. If the interval does not exist, enter Ø). XE Find the interval(s) on which the function is concave up. (Use symbolic notation and fractions where needed. Give your answer as interval(s) in the form (*, *). Use the symbol ∞ for infinity, U for combining intervals, and an appropriate type of parenthesis "(", ")", "[", "]" depending on whether the interval is open or closed. If the interval does not exist, enter Ø). XE Find the interval(s) on which the function is concave down. (Use symbolic notation and fractions where needed. Give your answer as interval(s) in the form (*, *). Use the symbol oo for