Consider s = (((1) ∗ 2 + 3) ∗ 5 ∗ 6 + 7). 1. Explain how the word s came to be. 2. Draw the word s's tree structure. 3. Use GetExp to track the execution of your application (s, 1). Draw a tree with a box for each time a routine is called, in other terms. Include only whether it is an expression, word, or factor in each field, as well as the parsed string s[i],..., s[j 1].

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