Using vba prepare a code with appropriate comments to answer the questions attached in the provided image, can you please answer it in the following way $-$ Show a relevant plot illustrating the integration procedure for sizing the reactor.

$-$ Estimate the size of the plug flow reactor $($VPFR$)$ using trapezoidal numerical integration by means of a visual basic function.

$-$provide information on the flow of components in the product stream.

$-$ Answer the question at the green box