Please help with this Visual Basic exercise:

In Exercise 68, write an event procedure with the header Private Sub btnCompute Click (. . .) Handles btnCompute.click, and that has one line of code for each step. Lines that display data should use the given variable names. 68. Stock Purchase. The following steps calculate the amount of a stock purchase: a) Declare the variables priceShare, amountofshares, and quantity as type Double b) Assign the value 5.25 are. c) Assign the value 40 to the variable amountofShares. d) Assign the product of the values of priceShare and amountofShares to the variable quantity. e) Display the value of the variable quantity in a list box. Answer: to the variable pricesh