A. No, all you need is for your water to be hot enough to dissolve the simple table sugar you're mixing in.
Remember, table sugar ONLY, in a ratio of 1 part sugar to 4 parts water.
And no red dye - your hummingbird feeder is colorful enough to attract them, and once they find that your feeder is a good source of quality nectar, they'll keep coming back!
Easy Nectar Conversion Chart - how much sugar and how much water to make 1 cup or more of nectar.