(b) Two laptop producers, Micron and Mega, are considering producing a new model of laptop which requires heavy investment. If both produce, both will incur a loss of $100 million. If only one produces, it will earn a profit of $200 million and the other which does not produce will earn a profit of $20 million. If both do not produce, both will earn a profit of $50 million. If Micron gets to make a decision first, apply the sequential game concept, construct a decision tree diagram, explain and solve for the solution using a roll-back method.