Question is from the case "Forecasting for the Love Boat: Royal Caribbean Cruises in 1998" using Royal Caribbean's financial statements, compute 1998 NOI, NFE, NOA, compute the components of ROE using the advanced Dupont decomposition. Evaluate any trends in the Royal Caribbean's ROE, RNOA, leverage, spread, operating profit margin, operating asset turn over. Compare the trends in carnival cruise's respective ratios and discuss main causes of any differences.