07 When you make popcorn in a microwave. you realize that there are always more unpopped kernels than you would like. You also of course don't want to leave the bag in the microwave for too long so as not to have burnt popcorn. Suppose that you want to design an experiment to study the determine what contributes to the proportion of unpopped kernels of popcorn. Complete the rst three steps of planning and designing an experiment to accomplish this. In the experiment discussed in question 7, list any major sources of variation that would be difcult to control