SAMPLE: This is how I would like you to answer Questions #5 and #6.
You are making sugar water for your hummingbird feeder. A website indicates to use 4 parts of water for every 1 part of sugar. You use 20 cups of water. How much sugar do you need? You can add/subtract the ratio - or - multiply/divide by the same number.
Initial my diagram to get credit for Question #4.