Write an Eventlang program that models a vending machine that dispenses four objects: milk, cookies, chocolate, and candy. The vending machine accepts an amount, dispenses the appropriate product, and gives change. Milk costs $1, cookies cost $0.75, chocolate costs $0.50, and candy costs $0.25.

The program works as follows:

• When the event CoinInserted is announced with amount inserted as the payload, the handlers for milk, cookies, chocolate, and candy are all run, as well as a handler to prompt for adding more money.
• If the amount inserted is greater than $1, then the handler for milk announces the event Dispense with the string “milk.” It also announces the event Change, with the remaining change as the payload.
• If the amount inserted is greater than $0.75 and less than $1, then the handler for cookies announces the event Dispense with the string “cookies.” It also announces the event Change, with the remaining change as the payload.
• If the amount inserted is greater than $0.5 and less than $0.75, then the handler for chocolate announces the event Dispense with the string “chocolate.” It also announces the event Change, with the remaining change as the payload.
• If the amount inserted is greater than $0.25 and less than $0.5, then the handler for candy announces the event Dispense with the string “candy.” It also announces the event Change, with the remaining change as the payload.
• If the amount inserted is less than $0.25, then the handler for adding more money prints “Add more money.” It also announces the event Change, with the remaining inserted money that is less than $0.25, is returned as the payload.
  The handler for the event Change prints the change to be given, and the handler for the event Dispense prints the product that is being dispensed.