For each of the variables described below, indicate whether it is a quantitative or a categorical (qualitative) variable. Also, indicate the level of measurement for the variable: nominal, ordinal, interval, or ratio. Make sure your responses are the most specific possible. Variable Type of Level of variable measurement X ? Quantitative Nominal (a) End-of-year stock classification (high Ordinal yield, medium yield, or low yield) OInterval Categorical ORatio Quantitative Nominal (b) Playing time (in seconds) of a DVD Ordinal OInterval Categorical Ratio Quantitative Nominal (c) Color vision status (colorblind or not Ordinal colorblind) OInterval Categorical Ratio