$1)$ Describe and discuss the differences and relationships between purchasing, procurement, and strategic sourcing. How have these concepts evolved?

$2)$ A key part of the procurement process is the selection of suppliers. What criteria are commonly used in this selection process? Which criteria should be given the highest priority? Why?

$3)$ What are the components of total landed cost? Is it realistic to expect companies to consider all of these components?

$4)$ Describe the different types of e$-$commerce business models available for procurement and point out their respective benefits and disadvantages.