Explain Stackelberg Model: Sequential Move game elaborately with a case study/problem (first define it) covering everything under a single problem.

I am struggling with this question for a Game Theory course. It would be great to have a visual breakdown of how to solve it so that I understand what to do for the rest of the problems.

Two rival companies competing in the same market need to decide their plans for future expansion of their stores. The Table below shows the possible outcomes of their mutually interdependent actions (payoffs are profits in £m)     Giga Company Titanic Conglomerate   No Change Refurbishment of existing stores Large Expansion No Change     30, 40      25, 35    15, 24 Refurbishment of existing stores     35, 30      28, 32    18, 33 Large Expansion     12, 22     18, 20    20, 25   The Nash equilibrium:            (A)       does not exist. (B)       occurs when both firms choose Refurbishment of existing stores.              (C)       occurs when both firms choose Large Expansion. (D)       occurs when both firms choose No Change.

PART C D