Please answer these two questions in depth

A project consists of seven activities. The activity durations and costs are estimated in two modes: the normal mode and the crashed mode. Fig.1 Fig. 2 | |Activity Durations and Costs Activity QMmoo m> Sum Duration (days) 4 0w N~ WL Normal $ $ $ $ $ $ $ $ Direct cost 1,000 2,500 750 3,500 500 2,000 4,500 14,750 Duration (days) 3 =~ a0 oW Crashed Normal duration Direct cost A h e & e $ 2,000 5,000 1,200 5,000 2,000 3,000 6,300 24,500 The total project cost is determined as the sum of activity (direct) costs and the indirect costs. & N A H N &H &n Slope ($/day) 1,000 1,250 450 750 1,500 1,000 900 The indirect costs for the project change according to the project duration. (See Table 1 below.) For example, the project cost at the normal mode schedule is $26,750 from the sum of activity (direct) costs, $14,750, and the indirect costs for the 17-day normal schedule, $12,000. Table 1. Indirect costs of the project Indirect costs $6.500 $7,500 $8,500 $10,000 $12,000 1. Determine the project duration of a crashed schedule, which minimizes the total project cost. Note that all activities can be crashed by one day. 2. Determine the minimum project cost