A thermoplastic-glass fiber composite is manufactured using injection molding. The length of the fiber fed into the machine is 20 mm. After molding, the fiber length is found to degrade to 5 mm. What is the % decrease in reinforcing efficiency. Assume a critical fiber length of 2.0 mm. If you want to maintain the original reinforcing efficiency in the molded part, what would you do? Please show your calculations to justify your answer