Question 1 [14] This data set (listed in Table 1.1} shows the trend from 19T to 1931] of the number of reported claims of South Africa's reinsurance companies (from the annual report of the South African Insurance Associa tion} together with the least squares {LS} residuals, ef. Table 1.1: Number of Fire glaims in South Africa from 19%- to 1931] Year Number of res (31') {yr} Er to 16694 1966.2 T? 122?] 2[IT2.3 \"8 12904 4051.3 \"9 14035 461? 80 138114 593.2 {a} Calculate the following: (i) the median of the residuals, \"$33M, {2} (ii) o'MSE and {2} (iii) the median absolute deviation (thD) of the residuals, mgm - "ieh {6} (iv) Web one is a more robust measure between #111513 and MAD? Give reason[s}. {I} {b} Describe the following procedures indicating situations where it is necessary to use them: {i} Ridge Regression. {3} {ii} Iteratiitel},r Reweighted 1.5 (IRIS). {3} {iii} Least Absolute Deariation (LAD) Regression (Median Regression). {3} {c} Wh}r do you think that the L5 is still more popular than either IRLS and [All {3}