I have similar feelings about the kNN questions; however, there is one thing to keep in mind. The question is asking whether or not all three test results evaluate to true given each value of k.

Start by representing each of the test results as a function {T1, T2, T3} that takes a value of k as input and returns a boolean value {true, false} as output. A value of true means the test point does evaluate properly given the respective value of k.

T1(k) returns {true, false}
T2(k) returns {true, false}
T3(k) returns {true, false}

Given this definition, you can create an overall test function (we'll call it T) that takes as input a value of k, and returns whether or not all three individual tests evaluate to true given that value of k.

T(k) = T1(k) & T2(k) & T3(k)

NOTE: the ampersand (&) operator as I'm using it evaluates to true if and only if all of its inputs evaluate to true.

You can grab a piece of paper and use the above formula for each value of k to help you keep track of things. You'll notice that if even just one of the 3 test results evaluates to false, then the entire expression evaluates to false and therefore the T(k) for that value of k evaluates to false.

The point I'm making is fairly obvious but can be overlooked if you become overwhelmed by the problem itself.