The visualization below shows voting patterns in the United States, Canada, and Mexico in the United Nations General Assembly on a variety of issues. Specifically, for a given year between 1946 and 2015, it displays the percentage of roll calls in which the country voted yes for each issue. This visualization was constructed based on a dataset where each observation is a country/year pair. Arms control and disarmament Colonialism Economic development 1.00 0.75 0.50 0.25 Country 0.00 Canada % Yes Human rights Nuclear weapons and materials Palestinian conflict 1.00 .00 – Mexico US 0.75 0.50 0.25 0.00 1960 1980 2000 1960 2000 1960 1980 2000 1980 Year i What are the variables used in creating this visualization? (a) Identify the continuous numerical variables in this study. (Select all that apply.) voting yes percentage year issue type city O country O There are no continuous numerical variables. (b) Identify the discrete numerical variables in this study. (Select all that apply.) voting yes percentage O year issue type city Windows 17\" Windows O country O There are no discrete numerical variables. (C) Identify the nominal categorical variables in this study. (Select all that apply.) voting yes percentage year issue type city country There are no nominal categorical variables. (d) Identify the ordinal categorical variables in this study. (Select all that apply.) voting yes percentage year issue type city country There are no ordinal categorical variables.lly-for-a-given-year-between-1946-and-20