The following 18 values are a random sample of the monthly gross earnings in euros of employees of a large hotel business.

978	3.974	1478	1.694	876	1.831	2297	2.571	1118
1.431	1.984	2021	1657	1.479	1109	1.798	2.374	1964

a) Based on the above values, create a frequency table with the categories [0, 1,000), [1,000, 2000), [2,000, 3,000) and [3,000, 4,000) and calculate based on it the measures of central tendency and dispersion that were calculated in the previous queries (except for the range). b) Assuming that starting next month the salaries of all hotel employees will increase by 5%, calculate the new salaries of the 18 employees in the sample and calculate the mean and standard deviation (for the ungrouped data). What do you notice about the values of the corresponding measures for the original (before augmentation) data?