2 tablespoons of popcorn kernels will make 4 cups of popcorn.  For movie night, Joanie wants 3 cups of popcorn, Mitchell wants 4 cups of popcorn, Miles and Davis said they would split 6 cups of popcorn and Cliff said he would only eat 3 cups.  How many tablespoons of popcorn kernels will they need?
Give me a clear explanation.