(d) (answer only - 2 marks) In our work with approximate solutions, we have been using the diagram at the right to guide our thinking about the relationship among the differ- -. . . . .... ent vectors that we work with in the solution. Even though V the dimensionality of this diagram may not be right for the problem here, identify the analogues for this problem of the target point T and the foot of the perpendicular F. (e) (answer only - 2 marks) The simple structure of the data set given in part (a) allows you to use the solution in (b) to provide, without doing any calculations, a data set in a t-z coordinate system in which the best-fit line has equation of the form z = at +b Find such a data set and give the best-fit line