QUESTIDN 1 A computer company is tryi rig to increase its sales and is planning to run a new marketing campaign. Tn be able to set a new target far sales them:r have decided to use the data of the last 30 menths. The number [If sales for the last 30 months is as fellows: By using this data set, please calculate; a] Mean of the data. b} 1Illariance cf the data. :2] Standard deviation of the data. d} Make a comment on the standard deviatinn with regards to the mean of the data