please answer quickly

Question 1: Assume that you are the procurement manager of ABC Enterprises and one of your new vendor M/s. Hashim Pvt. Ltd. is located in your region and well- known in order to provide Free Home Delivery over 5 years with Best Quality as well as on very cheap price. (a) What are the major activities and internal controls performed by ABC Enterprises in order to keep long-term business relationship? (b) List down the major documents used to ensure that all activities are performed well in revenue cycle? (c) List down the possible threats and controls that could be affect revenue cycle of M/s. Hashim Pvt. Ltd. Due to COVID-19