1) N can't be in 1 2) If H is in 1, N is in 5 3) If N is in 2, I is in 1 4) K comes right after V (VK)
We're told that for this question, I comes right after H, so we have an HI box. The question asks which days could be the ones that Harry is scheduled for.
You asked why he can't be scheduled for Tuesday. Let's take a look.
If H is scheduled for Tuesday, then that means I must be on Wednesday since we're told for this question that I comes right after H.
_ H I _ _
We also know that VK go right next to each other. The only places we can fit the VK box are in the Thursday/Friday slots.
_ H I V K
We have 1 game piece left, N. N must go into 1. However, we have a problem. Our first rule tells us that N can't go into 1 (Monday), so this game board doesn't work. As a result, we know H can't go on Tuesday.
Does this make sense? Let us know if you have any more questions!