Given is a PERT project network diagram as shown below: Star En AB C D EF G H I J K t d 0 8 1 1 2 2 1 1 2 3 1 8 6 1 8 2 2 0 4 4 6 0 a) The Project Completion time = _____________________ b) The Earliest Start time, ES, of Activity F = ___________________ c) The Earliest Start time, ES, of Activity K = _______________________ d) The Latest Start time, LS, of Activity E = _____________________________ e) The non-critical activities are = _______________________ (ex. type in critical activities as ABCD, no comma, no space)