In this question, we will investigate how error carries forward in STACK questions. It is important that you answer the parts in order. Try answering part 2 now, before answering part 1. If you click on "check" nothing will happen. Part 1) Let z = 3 x 1. (Obviously zis 3, however, let's assume that you've made an arithmetic error along the way and you enter an answer of 2.) Enter the number 2 in the box below. z = Part 2) Enter the value for 2z in the box below using the incorrect value of z that you entered in the box above. 2z = Part 3) Enter 3z in the box below using the incorrect value for that you entered in Part 1. 3z = Now, obviously the correct answers should be 3, 6, 9 respectively. However, if you enter the first box INCORRECTLY, but then proceed to calculate 2z and 3z CORRECTLY, then you will not be penalised for your answers (besides the obvious penalty from getting part 1 incorrect). HOWEVER, If you are given an opportunity to re-attempt the question and you RECALCULATE z correctly as 3, your original answers for Parts 2 and 3 will now be marked WRONG as your value of z has CHANGED, so you must RECALCULATE 22 and 3z. Note: Feel free to try different values of z in the first box, followed by the correct answers of 2%, 3z. E.g. Answer 1 = 5, Answer 2 = 10, Answer 3= 15 will be marked as incorrect in Part 1, but marked as correct in Parts 2 and 3. However when you recalculate z you must re-calculate Parts 2 and 3 as mentioned above. Check