please answer all questions correctly and give explanation. Will give a thumbs up

QUESTION 1 Knowing cost behavior helps answer How will a 5 % increase in unit sales impact cost & profit O True O False QUESTION 2 If Fixed Costs are 1,000 and Contribution Margin per unit is $50 the B.E. in Units = O 20 O 200 O 2,000 QUESTION 3 Selling Price - Variable Cost per Unit O Fixed Cost Per Unit O Contribution Margin Per Unit O Break Even in Units QUESTION 4 If we go outside of the relevant range, cost estimates must be re-evaluated O True False QUESTION 5 As long as we remain in the relevant range, total fixed costs do not change with changes in activity, but per unit fixed cost does True @ False QUESTION 6 Cost behavior refers to OA) how costs react to a change in the level of activity O B) whether a cost is incurred in a manufacturing or service OC) classifying costs as either perpetual or period costs OD) whether an expense goes to the income statement QUESTION 7 On a per unit basis variable cost is O Constant O Changes