Chapter 8 Scheduling Resources and Costs 283 You have prepared the following schedule for a project in which the key resource is a tractor(s). There are three tractors available to the project. Activities A and D require one tractor to complete while activities B, C, E, and F require 2 tractors. Develop a resource-constrained schedule in the loading chart that follows. Use the parallel method and heuristics given. Be sure to update each period as the com- puter would do. Record the early start (ES), late finish (LF), and slack (SL) for the new schedule. 4 C 8 2 2 2 10 A 4 6 4 10 Legend 11 1 ES ID EF 14 5 5 D 10 10 F 12 SL SL 0 1 0 020 LS DURALF 5 0 B 5 5 10 10 2 12 Resource 0 2 0 05 5 5 E 8 2 2 2 7 3 10 Use the following heuristics: Minimum slack Smallest duration Lowest identification number ID RES DUR ES LF SL O 1 2 3 4 5 6 7 8 9 10 A 1 4 B2 10 5 C2 4 D1 E2 5 3 F 2 2 11 12 13 14 15 15 Resources available 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 Resources scheduled "The solution to this exercise can be found in Appendix 1.