Study the code below and then link the explanation with the code:

#include

#include

int main$()\{$

$//$ Create a vector of integers

std::vector numbers $=\{10,20,30,40,50\}$;

$//$ Declare an iterator for the vector

std::vector::iterator it;

$//$ Iterate through the vector using the iterator

std::cout $<<$ "Elements in the vector: $"$;

for $($it $=$ numbers.begin$()$; it $!=$ numbers.end$()$; $++$it$)\{$

std::cout $<<*$it $<<""$; $//$ Dereference the iterator to access the element

$\}$

std::cout $<<$ std::endl;

$//$ Modify elements in the vector using the iterator

for $($it $=$ numbers.begin$()$; it $!=$ numbers.end$()$; $++$it$)\{$

$*$it $+=5$; $//$ Add $5$ to each element

$\}$

$//$ Print the modified vector

std::cout $<<$ "Modified elements in the vector: $"$;

for $($it $=$ numbers.begin$()$; it $!=$ numbers.end$()$; $++$it$)\{$

std::cout $<<*$it $<<""$;

$\}$

std::cout $<<$ std::endl;

return $0$;

$\}$

A vector numbers is initialized with the elements $\{10,20,30,40,50\}.$

Answer $1$

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Declares an iterator it for the vector. This iterator will be used to traverse the vector.

Answer $2$

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The loop uses the iterator to traverse the vector from the first element $($numbers$.$begin$())$ to the end

Answer $3$

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The second loop modifies each element in the vector by adding $5$ to it using the iterator.

Answer $4$

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