please answer all questions correctly

and give explanations

QUESTION 2 To accurately predict costs, managers must understand how costs behave with changes in activity True False QUESTION 4 Variable costs such as direct labor and direct materials typically stay constant on a per unit basis True False QUESTIONS 2 White 85.000 units are produced, the fixed cost in S10 per unit. Assuming our company is within the relevant riage and we produce 120,000 units, our fixed costs per unit will remain at $10 per unit True O'False