i-v please and thank you

Measurements on call-failures in a Telephone Central Office (TCO) compiled over eight bimonthly data, i=1,2,,6 indicate random values (RVs) with corresponding frequency of occurrence (nn). Relevant assessments done at two independent sites of TCO X and TCO Y and pertinent details are listed below. (The percentage values ( Cx and Cy ) shown are measures offsets of call-failures with respect to a reference of zero value) Determine the following: (i) Expected average and variance of the RV in each site, [E[x],V(x); E[y],V(y)] (ii) Inter-quartile ranges (IQRs) of the RVs at X and Y. (iii) Average performance of the RVs at X and Y expressed in terms of their approximate GM values (iv) Off-sets of expected mean with respect to median in each case: (Median E[.]D (v) Skewness of central tendency of the RV in terms of relevant Pearson coefficient