Using vba prepare a code which gives correct results with the addition of appropriate comments. The flow rate of the saturated stream is $500$ m$3/$hr $.$ Can you answer the question in this particular way $-$

$-$Locate a set of values for the closest temperature or pressure values in order to complete the interpolation.

$-$Perform an interpolation.

$-$ Returning the property at the specified T and P

$-$Use the property to answer the required questions.

The vba code should be able to do all these markers, and provide an answer for the question boxes, Thank you.

Edit : Mostly need help finding heat input required for the boiler through the code.