Question

see the attached file and answer it for me
Do THE SECOND PART ​

Answer 1

C.I. f x d = x - 225 d' = fd' 100 - 150 4 125 -100 -2 -8 150 - 200 5 175 -50 -1 -5 200 - 250 12 225 0 0 0 250 - 300 2 275 50 1 2 300 - 350 2 325 100 2 4 25 -7 Here, A = 225