Excel, Solvers, Decision Trees, Present Value

Excel, Solvers, Decision Trees, Present Value need a scholar that could help me with my midterm exam, the exam will covers: 1) the basics of excel and how we use excel and how we get answers from excel 2) the basics of solvers and how we make decisions using solvers 3) the use of decision trees in a larger context of probabilistic present value decision making, 4) net present value, branching decisions based on expected present values