According to the materials answer each question in 150 words：
a) Cost leadership. Analyze Greensky’s approach with its cost leadership strategy to help the follower firms (subcontractors) manage their cost of doing business by improving their capability for differentiation.
b) Differentiation. Analyze Greensky’s approach to enhance differentiation business strategy of the leader firms (lenders) by reducing their cost of doing business. Note. Differentiation is the ability of a firm to generate more value than the cost of doing business. https://www.youtube.com/watch?v=V14kuqYEsxE
c) Blue ocean. https://www.youtube.com/watch?v=NmID9jLbZ04 Analyze how Greensky has designed a “blue ocean” business strategy for itself using the four actions framework.