... call:[({Fact N1 R1}, {N1 → 4, R1 → r 1 , }),(R=N*R1, {R → r0, R1 → r 1 N → 5, })]• At the second call:[({Fact N1 R1}, {N1 → 3, R1 → r2, }),(R=N*R1, {R → r 1 , R1 → r2, N → 4, }),(R=N*R1, ... r0, R1 → r 1 , N → 5, })]• At the third call:[({Fact N1 R1}, {N1 → 2, R1 → r3, }),(R=N*R1, {R → r2, R1 → r3, N → 3, }),(R=N*R1, {R → r 1 , R1 → r2, N → 4, }),(R=N*R1, {R → ... TechniquesLL1L2S1S2SL 11 L12L 21 L22 S22S 21 S12S 11 SplitSplit MergeMergeSplit MergeInputlist listSortedFigure 3.9: Sorting with mergesortcall{LengthL2 foo} is legal (it returns 1) , wherease...