Please help me with the incorrect answers below (in red). Any explanation you can offer is helpful -- I am trying to learn this. Thank you!

Analytics Exercise 4-2 (Algo) You work for a company that makes cell phanes and have been made project manager for the design of a new cell phone, Your supervisors heye alregdy scoped the project, so you herve a list showing the work breekdown structure, and thli includes mejor project activtles. You must plan the project schedule and calculate project duratlon. Your boss wants the schedule on his desk tomorrow momingl You have been glven the informatlon in Exhiblt 4.13. It includes all the actlultles required In the project and the duratlon of each activty. Also, dependencies between the activities have been identfled. Remember that the preceding activity must be fully completed before work on the following activity can be started. Your project is divided Into flve major subprojects. Subproject. involves developlng speclfications for the new cell phone. Here, customer uses the cell phone. These user speclflcatlons are redefined in terms that have meaning to the subcontractors that will actualy make the new cell phone in subproject "g" supplier specifications. These involve engineering detais for how the product will perform. The indluidual components that make up the product are the focus of subproject "D?." Subproject "i" brings all the components together, and a working prototype is bullt and tested. Fingly, In subproject, "V," suppliers are selected and contracts are negotiated. Exhilbit 4,13: Work Breakdown Structure and Activities for the Cell Phonc Desisn Project a. Calculate the start and finish times for each activity. (Leave na cells blank - be certain to enter "on wherewer required.) b. Detemine the minimum number of weeks for completing the project. c. Find the actlvites that are on the critical path for completing the project in the shortest time. P1-P2-P3-P4-51-D2-12-13-14-V2 P1-P2-P3-P4-St-D3-D4-11-14-12 P1P2-P3P4-51D1-D4-14-14 P1-P2-P3-P4-51-D2-D4-11-14-V2