An experiment consists of rolling a die and flipping a coin. Following is an incomplete tree diagram that represents a part of the experiment. Numbers 1 through 6 branching from a center point. © 2018 StrongMind. Created using GeoGebra. What should be done to complete the tree diagram? Responses The diagram is already complete. The diagram is already complete. Branches should be added from each number to the numbers 1 through 6. Branches should be added from each number to the numbers 1 through Branches should be added from each number to either H or T. Branches should be added from each number to either H or T. Branches should be added from each number to both H and T.