################ Please use PSEUDOCODE for the solution ##############

Task 5: Complete the following function: function CHECKCOLUMN(puzzle, j) end function This function will take the vector puzzle (as produced by MAKEVECTOR) as an input parameter and check that column j contains all numbers from 1 to 4: if it does contain all numbers from 1 to 4, it should return TRUE, otherwise it should return FALSE. The procedure you should use is the one outlined above. To get full marks you need to call SEARCHSTACK(stack, item). [4 marks] Once we have a method for checking one column, we can use the following function to check all columns: function CoLCHECKS(puzzle) for 1j4 do if CHECKCOLUMN( puzzle, j)= FALSE then return FALSE end if end for return TRUE end function This will be useful later on. The next set of conditions to check is to see if all integers from 1 to 4 appear in the 2-by-2 sub-grids. In the next task, the goal is to replicate the approach of the function CHECKCOLUMN but for these sub-grids. In the function you should repeatedly call SEARCHSTACK for each element in a sub-grid, and then do this for all four sub-grids