A 5 x 6 rectangular grid with unit cells is given. let a (0, 0) and b(5, 6) be the bottom-
left corner and top-right corner, respectively. a traveler can move along the sides of
the cells to the right and up only.
a) how many paths are there that pass through c (3, 2)?
b) how many paths are there that don't pass through c (3, 2)?