Lean operations attempt to eliminate which of the following types of waste? 1.Excess inventory 2.Waiting time 3.Unnecessary transportation / movements 4.Product defects 5.Underused people Group of answer choices a/ 1 b/ 1, 2, & 4 c/ 1, 3, & 4 d/ 1, 4, & 5 e/ All of the responses are correct