please help with this shortest path problem, thank you.

a Store sell 5 types of Candy A, B, C, D,E the cost of candy and its demands ave given in the following table. Note that when one type of candy sold out, Customer who loves this candy will buy another candy to that has higher price .. lege when candy c sold out, customer who used to buy candy c will buy candy Eor D a candy | B C D E cost 5 9 lo demand/ loo 200 250 300 400 a) Formulate this problem as a shortest path problem whose solution minimize the cost of candy b). use Dijkstra's theorem to solve the