5. (Trinomial lattice) A trinomial lattice is a special case of a trinomial tree From each node three moves are possible: up, middle, and down The special feature of the lattice is that certain pairs of moves lead to identical nodes two periods in the future. We can express these equivalences as up-down down-up middle-middle middle-down = down-middle middle-up up-middle Draw a trinomial lattice spanning three periods How many nodes does it contain? How many nodes are contained in a full trinomial tree of the same number of periods?