please solve q2 and q3 ASAP

Exercise 4.1 Consider the two-dimensional placement of mxn functional cells as an array of size m x n. All the cells have identical shape and size. Let the cells be numbered 1, 2, ..., mx n. Cell i is placed in row r; and column c; of the array. (2) Let wij be the number of wires between cells i and j. Derive an expres- sion for the total wirelength of the placement. (3) Verify your formula for Figure 4.2(b). (b)