A certain engineering company hired the following number of Class 1 engineers during the first six months of the past year. (Assume the data represents a sample.) Number of Month Engineers Hired January 2 February 2 March 4 April 2 May 8 June 0 Using the above data, compute the mean, the median, and the mode. (a) Determine the mean, the median, the mode, and the range for the above data. mean 3 median 2 mode 2 range 8 (b) Compute the variance and the standard deviation. (Round your answers to three decimal places.) variance standard deviation (c) Compute the first and the third quartiles. first quartile third quartile(d) Compute the z-scores for the months of May and June. (Round your answers to three decimal places.) May June