Please solve these answers with detailed calculation. Please solve on the copy. And please solve all of these.. Thanks....

1-what are the Advantages of management accounting? 20 MARKS 2-Calculate the operating income( income before taxes ) from the following data : Sales revenue $300000-beginning inventory $40000-ending inventory$35000-cost of goods manufactured $ 45000, marketing expenses $30000- 20 MARKS 3-GIVING THE FOLLOWING DATA REGARDING SALES USING REGRESSION (LINEAR MODEL ). 20 MARKS FIRST CALCULATE THE VARIABLES OF THE EQUATION 1-linear regression model how will be the orders by week 7 ??, data of the previous 4 weeks are represented in the following table? Week 1 2 3 4 3 4 3 10 Sales with millions x=10 v=20 Sxy=60 Sx^2=30 Average x=2.5... average y=5 SECOND : STATE THE REASON WHY ACCOUNTANTS USE THIS THIS METHOD TO FORCAST ? 4-what are the types of costs ? GIVE EXAMPLES OF YOUR OWN 20 MARKS ? 5-WHAT IS THE Budgeting Cycle? GIVE EXAMPLES ? 20 MARKS