A shipping company uses the following function to calculate the cost (in dollars) of shipping based on the weight of the package (in pounds).

Write a program that prompts the user to enter the weight of the package and displays the shipping cost. If the weight is negative or zero, display a message “Invalid input.” If the weight is greater than 20, display a message “The package cannot be shipped.”

Transcribed Image Text:

3.5, if 0 < w <= 1 5.5, if 1 < w <= 3 c(w) 8.5, if 3 < w <= 10 10.5, if 10 < w <= 20