There are THREE questions, please help with all three

(Chegg guidelines SUGGEST one question per post for a faster response time but we are more than welcome to ask multiple questions)

1. Using the following data, estimate the new Return on Investment if there is a 9% increase in sales - with average operating assets as the base.

Sales	$2,522,237
Contribution margin	35%
Controllable fixed costs	388,030
Average operating assets	$4,212,249

Round to two decimal places. Be sure to enter the answer as a percentage but do not include the % sign.

2.Using the following data, estimate the new Return on Investment if there is a 6% decrease in variable and fixed costs- with average operating assets as the base.

Sales	$2,394,527
Contribution margin	35%
Controllable fixed costs	220,021
Average operating assets	$4,767,594

Round to two decimal places. Be sure to enter the answer as a percentage but do not include the % sign.

3. Using the following data, estimate the new Return on Investment if there is a 13% decrease in the average operating assets - with the new average operating assets as the base.

Sales	$2,686,998
Contribution margin	44%
Controllable fixed costs	313,082
Average operating assets	$4,608,149

Round to two decimal places. Be sure to enter the answer as a percentage but do not include the % sign.