please give complete answer with 5 marks each question. thank you

The Maintenance Division of the Usaha Mulia company is responsible for controlling the inventory of all spare parts of the machine to ensure all spare parts can be fully utilized. For that purpose, maintenance manager will apply the ABC system inventory. The part inventory, unit cost and annual usage are as follows. Based on Table 1, please answer the questions below: a) Compute each item's pereentage of total value and quantity, then rank the items according to their total value. (5 marks) b) List each item according to the ABC System inventory and make a conclusion based on that analysis