please explain all steps clearly

Problem 2. A young couple, Eve and Steven, want to divide their main household chores (marketing, cooking, dishwashing, and laundry) between them so that each has two tasks but the total time they spend on household duties is kept to a minimum. Their efficiencies on these tasks differ, where the time each would need to perform the task is given by the following table: Formulate a mathematical model to assign the different tasks to Eve and Steven. Clearly define your decision variables