$1.$ Work breakdown structure $($WBS$)$ of some hypothetical communications platform development

project is given below in task list form:

TASK Duration Predecessor $($Dependency$)$

$1.$ Business Analysis and High Level Modeling

$1\mathrm{.}1.$ Use Case Analysis and Requirements $6$ weeks

$1\mathrm{.}2.$ Modeling and Architectural Design $12$ weeks $1\mathrm{.}1$

$1\mathrm{.}3.$ Database Design $4$ weeks $1\mathrm{.}2$

$1\mathrm{.}4.$ Procurement of Project Hardware $1$ week $1\mathrm{.}3$

$1\mathrm{.}5.$ Definition of Test Cases $5$ weeks $1\mathrm{.}1$

$1\mathrm{.}6.$ Delivery of Project Hardware $10$ weeks $1\mathrm{.}4$

$2.$ Design and Development of the Communication Server Software

$2\mathrm{.}1.$ Detailed Architectural Design $8$ weeks $1\mathrm{.}2$

$2\mathrm{.}2.$ Development of the Switching Software $12$ weeks $2\mathrm{.}1$

$2\mathrm{.}3.$ Component Tests $4$ weeks $2\mathrm{.}2$

$3.$ Interactive Voice Response System and Call Center Server Design and Development

$3\mathrm{.}1.$ Voice Response System Framework $8$ weeks $1\mathrm{.}3$

$3\mathrm{.}2.$ Call Center Server Software $8$ weeks $3\mathrm{.}1$

$3\mathrm{.}3.$ Component Tests $4$ weeks $3\mathrm{.}2$

$4.$ Design and Development of Customer Relationship Management $($CRM$)$ Applications

$4\mathrm{.}1.$ Visual Designs $($wireframes$,$ mock$-$ups$)8$ weeks $1\mathrm{.}1$

$4\mathrm{.}2.$ CRM Frontend Development $8$ weeks $4\mathrm{.}1$

$4\mathrm{.}3.$ CRM Backend Development $6$ weeks $1\mathrm{.}3$

$4\mathrm{.}4.$ Component Tests $4$ weeks $4\mathrm{.}3$

$5.$ Integration Tests, Operation & Maintenance

$5\mathrm{.}1.$ Communications Server Integration Tests $4$ weeks $1\mathrm{.}6$ & $2\mathrm{.}3$

$5\mathrm{.}2.$ Corrections and Regression Tests $2$ weeks $5\mathrm{.}1$

$5\mathrm{.}3.$ System Integration Tests $6$ weeks $1\mathrm{.}6$ & $3\mathrm{.}2$ & $4\mathrm{.}4$

$5\mathrm{.}4.$ Corrections and Regression Tests $4$ weeks $5\mathrm{.}3$

$5\mathrm{.}5.$ Customer Training $2$ weeks $5\mathrm{.}4$

$5\mathrm{.}6.$ Acceptance Tests and Demonstrations $4$ weeks $5\mathrm{.}5$

Using the above WBS$,$

$$ Create the Gantt chart for the project.

$$ How long will it take to complete this project? You may ignore inconsistencies in

estimations.

$$ Create the Activity Network$/$Chart for the project, and give the critical activity path for the

project.

$$ Assuming that every individual task is to be carried out by only one person $($i$.$e$.,$ it is not

possible to divide any of the above listed tasks among more than one person$),$ but at the same time every person in the team is multi$-$functional, roughly how many people are

required so that the project can be completed with the minimum possible timeline?

$$ Assume that a serious, unanticipated setback occurs, and instead of taking $10$ weeks, task

T$1\mathrm{.}6$ takes $40$ weeks. What would be the effect of this setback on the overall project? What

kind of contingency plan can you propose to alleviate the negative effects of such a risk?

Please use Microsoft Excel or Libre Office Calc $($free counterpart of MS Excel$)$ to create your Gantt Chart by proper labeling$/$coloring$,$ and submit a $.$pdf $$ export of your document.