Your friend prepares an annual report and has calculated several financial ratios in this regard. Unfortunately, he has difficulties interpreting some ratios. In this context, he asks for your help in identifying the economic reasons for the following trends (explain each example in a few sentences):

a. The turnover ratio of the company's total assets is lower than that of its main competitors

b. The company's cash conversion cycle has significantly lengthened

c. The company's leverage and interest expense coverage ratio have increased

d. The company's share P / E ratio is significantly lower than for its main competitors