. . . a. Explain four barriers that may prevent new entrants from establishing in the Monjorino Jewellery Industry. b. Identify substitute retailers to the Monjorino industry and explain two reasons why they cannot be a threat to the profitability of the industry c. Explain three factors that make the suppliers of raw materials powerless in the industry d. Identify a complementary product of the Monjorino Jewelry Industry and explain how it contributes to the profitability of the industry