All you have to do is put the head, precursor, cursor, and tail on the correct value on the linked sequence.

For each question you will see a picture of a DoublelinkedSeq object and some code. Then you will drag the pointers available to show which node they will point too after the code (in the first picture) runs. If a pointer should be null after the code runs then do not drag it onto the picture. There is some leniency of where you can drag it onto the picture so it doesn't need to go into a specific pixel spot or anything, just onto the node that the pointer should now point. This will make more sense when you see the first question. *Drag the pointers directly onto the node it should be pointing too. The circle in the top left of each pointer is the part you want to make sure is on a node - the words on the pointers don't count* If you try the quiz on a mobile device and it looks or behaves strangely switch to a computer. head 14 3 17112 V-2 11 35 21 precursor cursor tail seq.advance(); seq.advance(); seq.advance(); head 14 3 17 25 -2. 2 1 11 35111 precursor cursor tail head 14 A3 17 25 I-2 11 35 precursor cursor tail seq.removeCurrent(); 31-17 | 125 | 12 | 13 | 143511 head precursor cursor tail head 14 3 417 25 I-2 11 | 35 seq.start(); precursor cursor tail 14 3 17 25 142 11 > 35 head tail precursor cursor head *H01-01-3121*11 precursor cursor tail seq.addAfter (6); 14 3 17 125 12 11 13 10h head precursor cursor tail head 14 3 17 25 -2 11 35 precursor cursor tail seq.addBefore(6); 6 14 3 17 25 A2 11 35 head precursor cursor tail head tail precursor cursor seq.addAfter (14); 14 12 head tail cursor precursor head 14 17 125 -2. 11 +35 precursor cursor tail seq.addAfter (30); 14 30 3 17 | 25 12 TH 11 35 head precursor cursor tail head 25141113 T th precursor cursor tail seq.addAll(seq); 25 12 1113514_25 H2H1113511 head precursor cursor tail For each question you will see a picture of a DoublelinkedSeq object and some code. Then you will drag the pointers available to show which node they will point too after the code (in the first picture) runs. If a pointer should be null after the code runs then do not drag it onto the picture. There is some leniency of where you can drag it onto the picture so it doesn't need to go into a specific pixel spot or anything, just onto the node that the pointer should now point. This will make more sense when you see the first question. *Drag the pointers directly onto the node it should be pointing too. The circle in the top left of each pointer is the part you want to make sure is on a node - the words on the pointers don't count* If you try the quiz on a mobile device and it looks or behaves strangely switch to a computer. head 14 3 17112 V-2 11 35 21 precursor cursor tail seq.advance(); seq.advance(); seq.advance(); head 14 3 17 25 -2. 2 1 11 35111 precursor cursor tail head 14 A3 17 25 I-2 11 35 precursor cursor tail seq.removeCurrent(); 31-17 | 125 | 12 | 13 | 143511 head precursor cursor tail head 14 3 417 25 I-2 11 | 35 seq.start(); precursor cursor tail 14 3 17 25 142 11 > 35 head tail precursor cursor head *H01-01-3121*11 precursor cursor tail seq.addAfter (6); 14 3 17 125 12 11 13 10h head precursor cursor tail head 14 3 17 25 -2 11 35 precursor cursor tail seq.addBefore(6); 6 14 3 17 25 A2 11 35 head precursor cursor tail head tail precursor cursor seq.addAfter (14); 14 12 head tail cursor precursor head 14 17 125 -2. 11 +35 precursor cursor tail seq.addAfter (30); 14 30 3 17 | 25 12 TH 11 35 head precursor cursor tail head 25141113 T th precursor cursor tail seq.addAll(seq); 25 12 1113514_25 H2H1113511 head precursor cursor tail