(10 points) The following shows the temperatures (high, low) and weather conditions in a given Sunday for some selected world cities. For the weather conditions, the following notations are used: c= clear; cl = cloudy; sh = showers; pc = partly cloudy. Hi Lo City Condition Acapulco 99 77 pc Bangkok 92 78 pc Mexico City 77 57 sh Montreal 72 56 pc Paris 77 58 Rome 88 68 cl Toronto 78 61 (1). How many variables are in this data set? (2). How many observations are in this data set? (3). Name the variables and indicate whether they are numerical or categorical. For which variables are arithmetic operations appropriate and for which are they not appropriate