please answer all 4 multiple choice questions pictured , please and thank you

Which of the following is true of flexible budgets? They serve only the control needs of management of an organization. They enable firms to compute expected costs for a range of activity levels. They allow managers to develop financial results for only one potential scenario. They do not require the managers to know the cost behavior pattern of each item in the budget. All of these are correct. Which of the following is true of budgets? Budgets eradicate the need to compare a company's actual results with budgeted results. Budgets ensure that the financial goals set by management are achieved. Budgets rule out the need to communicate and coordinate the plans of the organization to each employee Budgets are financial plans for the future. Budgets delegate the decision making power to the employees. Future costs that differ across alternatives are sunk costs. opportunity costs. product costs. relevant costs. variable costs. Which of the following costing methods focuses on the continuous reduction of the manufacturing costs of existing products and processes? Sigma costing Variance costing Overhead costing Kaizen costing