The following data set shows the average room price (in US$) paid by various nationalities while traveling abroad in a recent year. Complete parts (a) through (c) below. 111 90 78 68 75 57 a. Compute the mean, median, and mode. The mean is. (Round to two decimal places as needed.) The median is. (Type an integer or a decimal. Do not round.) Determine the mode. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The mode(s) is/are (Type an integer or a decimal. Do not round. Use a comma to separate answers as needed.) O B. There is no mode for this data set. b. Calculate the range, variance, and standard deviation. The range is (Type an integer or a decimal. Do not round.) The variance is. (Round to four decimal places as needed.) The standard deviation is (Round to two decimal places as needed.)