please solve with method that they said and use the formula

QUESTION 4. (25p) A construction company is planning to purchase a 3D software. The company has two alternatives. These alternatives are direct procurement. Expenditures and incomes related to alternatives are given below table. The interest rate is 10%. a. Please compare first two alternatives (A company and B company) according to the payback-period analysis and determine the optimum alternative. b. Please compare the optimum alternative found in the first question with service procurement alternative with present value method