Economics OBJ: 1-10: BDDCCABBCB 11-20: CBBCCDABAB 21-30: ACBCBCACCB 31-40: ACCBACDDBB 41-50: BCDDAACBA (1) ' tabulate ' sn:1,2,3,4,5 ' output:0,5,7,10 ,20, ' T.c:7,12,14,17, 27 ' AFC:0,7,3.5,2.3 ,1.25 ' ATC:0,12,7,5.6, 6.75 ' AVC:0,5,3.5,3.3 ,5 ' MC:0,5,2,3,10 ' ' (1ai) ' AFC=ATC-AVC ' =0-0=0 ' at2 ' AFC=ATC-AVC ' 7-3.5 ' =3.5 ' AFC=ATC-AVC ' =6.75-5 ' =1.75 ' ' (1aii) ' MC=0 ' MC=5-0=5 ' MC=7-5=2 ' M=10-7=3 ' M1=20-10 (2) Mr smiths scale of preference: items needed|price$. Textbooks|5.00. Shirt |2.00 shoes |3.00 trousers |3.00 notebooks|1.00 school fees|7.00 marthress|10.00 . Mr. Smiths disposable income :$7.00. (2ai)frm the scale of preference. Mr smith will spend his money on textbook and shirt. (ii) the reason why he should expend his money on two items above is that they are the pressing need and his income is $7.00 whch wil...