Please, I want a clear and correct solution in the shortest possible time, within a maximum of an hour, thanks

In process industry during a daily production run, a total of five (05) samples are collected with four (04) observations within each sample. The sample means (X-bar) are; 14.09, 13.94, 16.86, 18.77, and 16.64 respectively. The corresponding ranges are; 9.90, 7.73, 2.89, 7.56, and 3.49 respectively. The lower and upper control limits of the x-bar chart are respectively O a. 12.40, 19.72 O b. 16.55, 11.47 O c. 11.45, 20.67 O d. None is correct O e. 18.55, 13.47