please help, i got these two wrong and would like to know the right answer

t 0 / 1 pts Question 6 On a per unit basis, a fixed cost: is represented by a constant positive slope on the cost line. remains the same even as quantity changes. per unit decreases, as volume increases and vice versa). varies directly in a constant manner) with changes in volume (quantity). None of the choices are correct. 0/1 pts Question 4 Assume Company A sells its merchandise at $50 per unit. It has variable costs of $45 per unit, and fixed costs of $60,000. Assume Company B sells its merchandise at $50 per unit. It has variable costs of $25 per unit, and fixed costs of $100,000. Based on the information given, which company has the better operating leverage? Cannot say from the information given. Company B Neither company has any operating leverage. Both companies have the same operating leverage. Company A