Please show the steps of writing the VBA on excel!

a Write a VBA user-defined function to convert a weight fraction (wi) into a mole fraction (xi) of a multi-component system. The formula is: M A X w > M 1 where Mi is the molecular weight of the i-th component. a) Test your function for a binary system of methanol in 2-propanol (isopropyl alcohol). Determine the mole fractions of methanol (as component A) for mixtures with the following weight fractions: WA= 0, 0.125, 0.250,0.375, 0.500, 0.750,0.900,0.950, 1.00 = b) Plot the results in part (a) with the mole fraction of methanol shown as a function of methanol weight fraction for the binary methanol/2-propanol system. c) Display the entire VBA code resulting from your programmed user function. Include your name as a comment