The heights h (in inches) of pistons 1 and 2 in an automobile engine can be modeled by +7.2 h-3.75 sin(729) + 7.2 and h- 3.75 sin(729(+))+ respectively, where t is measured in seconds. Use a graphing utility to graph the heights of these pistons in the same viewing window for 0 sts 1. How often (in times/sec) are the pistons at the same place.) times/sec