A project requires many different resources for its execution. thus, a project manager has requested a new part from an out-of-state supplier. the supplier promises to ship the part within 24 hours, but due to a trade blockage, the shipment may take 3 to 6 business days to deliver. on the other hand, a local supplier can deliver the part within 4 business days. the project manager wants to execute the project smoothly without any delay. what's the minimum number of business days within which the project manager can receive the part?