The following data show the year-to-date percent change (YTD \% Change) for 30 stock-market indexes from around the world (The Wall Street Journal). Slick on the datafile logo to reference the data. a. What index has the largest positive YTD \% Change? Round your answer to one decimal place. index with a YTD \% Change of 0 b. Using a class width of 5 beginning with 20 and going to 40 , develop a frequency distribution for the data. Round your answers to the nearest whole number. If your is zero, enter "0". is zero, enter "0