please help me answer this question , thanks !

A multi-Facility inventory problem A company has multiple facilities producing silicon chips and transport to the warehouses every month for further distribution. Facility :3 costs 121- for transportation. pi for production. h:- for holding oost, and 5':- for the setup oost, expecting demand (it every month. Please formulate a linear programming problem to minimize the total annual cost. Facility 1 Facility 2 Facility 4 Facility 3 \fDecision variables: qir number of units produced at facility i at month t x number of units transported from facility i to the warehouse at month t yu number of units in the inventory at facility i at month t