Solve all: Input Filetracing $-$ NotepadFile Edit Format View Helphello, world, hello, universe hello, world, hello, universe

Question $1$: What is the value stored in 'sentence' after the function is run with

fname $=$ 'tracing.txt$\text{'}($the input file$)?$

Question $2$: Suppose you replace Line $11$ of the function with:

if word $==$ 'hello'

a$.$ Does the function output the same result as before? $($Express your answer as 'yes' or $\text{'}$no$\text{'})$

b$.$ Will the function error at any point? If not, your answer should be $-1,$ otherwise it should be the wordCount for which it might error.

Question $3$: Suppose you duplicate Line $17$ at the end of your code. What would be the value stored in 'sentence' after the function is run with fname $=$ 'tracing.txt$\text{'}?$

Question $4$: Suppose your input file contains the following text instead:

hello,world,Hello,universe hello,Galaxy,hELlo,planet

Which of the following replacements for Line $11$ would lead to the same result as the original function? SELECT ALL THAT APPLY

$\text{'}$A$\text{'}$: if lower$($word$)--$ 'hello';

$\text{'}$B$\text{'}$: if length$($word$)=-556$ all$($lower$($word$)=-$ 'hello'$)$;

$\text{'}$C$\text{'}$: if upper$($word$)=-$ 'HELLO' $56$ length$($word$)=-5$;

$\text{'}$D$\text{'}$: if strcmpi$($word$,$ 'hello'$)$;

You answer should be a string with all of the correct options in alphabetical order separated by a single comma. For example, if you think all of them are correct, your answer should be $\text{'}$A$,$B$,$C$,$D$\text{'}$

If you didn't know, the way an if statement works with && is if the first part of the statement is false, it doesn't even look at the second part! So if I have:

if length $($vec$)>-565$vec$(5)=-6$

when length$($vec$)5$ produces a false, Matlab won't even evaluate vec$(5)=6!$ This is important because if the length of the vector isn't at least $5$ then you wouldn't be able to index the $5$ th position and it would error!

Keep this necessary ordering in mind when answering the question.

Question $5$: Which of the following changes to the code could cause an infinite loop to arise?

SELECT ALL THAT APPLY

$\text{'}$A$\text{'}$: removing Line $17$

$\text{'}$B$\text{'}$: replacing Line $9$ with: $[$word$,$ rest$]=$ strtok$($string$,\text{'},\text{'})$

$\text{'}$C$\text{'}$: removing Line $10$

$\text{'}$D$\text{'}$: All of the Above

You answer should be a string with all of the correct options in alphabetical order separated by a single comma. For example, if you think the first $3$ are correct, your answer should be $\text{'}$A$,$ B$,$C$\text{'}$