_(blank)_ is concerned with long-term planning of manufacturing activity: Question 4Select one: a. Sales and operations planning b. Master production scheduling c. MRP d. Production activity control e. Master planningPostponement is best used with items that: Question 5Select one: a. Have a long lead time and many product configurations b. Are standardized and have short lead times c. Experience a yield that you won't know until the product is complete d. Suppliers with poor delivery performance