Problem Set 2 Feel free to use Excel QM or QM for Windows to answer the following questions 11.15 A marketing firm is developing a new Web-based media campaign for a client. The following table describes the relationships among the activities that need to be completed. a. Develop a project network for this problem. b. Determine the ES, EF, LS, LF, and slack time for each activity. c. Determine the total project completion time and the critical path(s). 11.25 General Foundry's air pollution project discussed in Chapter 11 has progressed over the past several weeks, and it is now the end of week 8 . The revised cost figures are shown in the table below. In a table like Table 11.8 in the chapter, provide Lester Harky with the: a. Value of the work completed b. Amount of any cost overruns or underruns for the project c. Extent to which the project is ahead of or behind schedule