you are working on a project to build an addition onto a local hospital. you have a total budget of 8.4 million dollars. you are 4 months into the project schedule and you are concerned that the project is going over budget. through the most recent reporting period you had planned to spend 4.2 million dollars while delivering on 50% of the project. currently your project team has spent 4.8 million dollars while delivering on 75% of the project. calculate the cost performance index of the project.