A shipping company uses the following function to calculate the cost $($in dollars$)$ of shipping

based on the weight of the package $($in pounds$).$

$()=$

$\{$

$$3\mathrm{.}500<<=1$

$$5\mathrm{.}501<<=3$

$$8\mathrm{.}503<<=10$

$$10\mathrm{.}5010<<=20$

Write a program that prompts the user to enter the weight of the package and displays the

resulting shipping cost. If the weight is outside the valid bounds, display an error message

$($supplied as a constant$).$ For example:

Enter package weight: $3\mathrm{.}6$

It will cost $$8\mathrm{.}50$ to ship this package.

Enter package weight: $0\mathrm{.}4$

It will cost $$3\mathrm{.}50$ to ship this package.

Enter package weight: $20\mathrm{.}1$

The package cannot be shipped!

To begin, first implement the shippingCost method to convert weight to cost $$ then you MUST

use this in your main, where you will perform all user input$/$output