Consider the following high$-$level supply chain for the food segment in the FMCG industry below for questions $3$ and $4.$ Consider the following Porter$$s generic competitive strategies map also for questions $3$ and $4.$ Supply Chain $($related to value chain as well$)$:

Raw materials $->$ Agriculture $->$ processing $($manufacturing$)->$ distribution $->$ wholesale $->$ retail $->$ end customers

Porter$$s generic competitive strategies map $($not drawn to scale but for illustration purposes$)$:

Woolworths food target market is the upper middle class and higher earners in the country. They are one of the few FMCG companies, if not the ONLY company in South Africa, that charges the same or MORE on their internal products vs external branded products. Woolworths foods has taken control and ownership of the supply chain from agriculture to final retail sale to customers. They have taken quality control to a whole different level in the process by engaging with all partners along the supply chain.

Assess what makes Woolworths successful dipping their hands in the supply chain, and thus better positioning themselves for differentiated competitive advantage, as compared to Checkers and Shoprite.