If the algorithm is at step $i=5$ and is using a window size of $n_c=4$, which specific data points are included in its context window? Explain your reasoning by stating the start and end indices of the window.

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The notation $$\mathbf{K}_{[i-n_c+1,i]}$$ represents a slice of a sequence of items (such as vectors) denoted by $$\mathbf{K}$$. This slice includes elements from the starting index $$i-n_c+1$$ up to and including the ending index $$i$$. This notation is commonly used to define a context window of size $$n_c$$ ending at position $$i$$.

Sequence Slicing Notation ($$\mathbf{K}_{[i-n_c+1,i]}$$)

Consider a sequence of items represented as $\mathbf{K} = (\mathbf{k}_1, \mathbf{k}_2, \mathbf{k}_3, \mathbf{k}_4, \mathbf{k}_5, \mathbf{k}_6, \mathbf{k}_7, \mathbf{k}_8)$. A specific slice of this sequence is defined by a context window of size $n_c = 4$ that ends at position $i = 7$. Which of the following sets of items correctly represents this slice?

A specific slice from a long sequence of items, $\mathbf{K}$, is given by the set $(\mathbf{k}_4, \mathbf{k}_5, \mathbf{k}_6, \mathbf{k}_7)$. If this slice is represented by the notation $\mathbf{K}_{[i-n_c+1,i]}$, what are the integer values for the ending position $i$ and the context window size $n_c$?

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