Machine Learning Expert for Ecommerce Project

We have a B2B eCommerce ordering platform. Task1: We need to predict when a customer should reorder an item and quantity based on past purchases. Task 2: We need to predict which items are frequently purchased together. Task#1 More info: Customers purchase products on a frequent basis (weekly or monthly). We have a list of orders, list of SKU, and quantity for that customer. Ex: Customer buys Product A every 3 weeks and buys 5 quantity. This would be just for that customer. If I query that SKU, it should tell us based on the prediction that 3 weeks and x quantity. Task #2 More Info: Customers purchases scissors and we should be able to say that all customers who purchase these scissors also buy comb together. This will be similar to frequently purchased together on amazon. If I query that SKU, it should say these are the other 2 SKUs that were purchased together. This data is currently stored in salesforce platform and we can export it to a database. We will look for recommendation from you on how to do this. Please let us know the past projects you have completed that are similar.