Please answer this as quick as possible! Thank you.

You are required to draw a UML activity diagram to represent the following scenario of a hairdressers salon.

Customers enter the salon and wait until the next hairdresser is free. They then indicate whether they would like their hair washed first or a dry-cut without having their hair washed. The hairdresser washes the hair (if asked for) and then cuts it. After finishing the customers hair the hairdresser moves onto the next waiting customer, or waits for another one to enter the salon. The customer goes to the till and waits for a cashier to be free to take their payment. They can pay by either cash or by credit card (where they need to type their pin into the machine) and they then leave the salon.