The following shows the temperatures (high, low) and weather conditions on 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. (a) How many elements are in this data set? (b) How many variables are in this data set? (c) How many observations are in this data set? (d) Name the variables and indicate whether they are categorical or quantitative. The high is a ---Select-- a variable, the low is a ---Select--- a variable, and the condition is a l --Seleci-- a variable. (e) For which variables are arithmetic operations appropriate? (Select all that apply.) C] hi (3 lo :Lmnditlnn