Activity $5$: Write a program to calculate trip costs of an employee. The trip cost includes costs of the following:

a$)$ Flight round trip cost

b$)$ Hotel cost for x number of days

c$)$ Car rental cost

Steps:

Use functions to calculate your trip's costs:

$$ Define a function called hotel$\_$cost with one argument nights as input. The hotel costs $$140$ per night. So$,$ the function hotel$\_$cost should return $140*$ nights.

$$ Define a function called plane$\_$ride$\_$cost that takes a string, city, as input. The function should return a different price depending on the location, similar to the code example above. Below are some valid destinations and their corresponding round$-$trip prices.

$$ "Napier": $150$

$$ "Auckland": $220$

$$ "Christchurch": $250$

$$ "Dunedin": $475$

$$ Define a function called rental$\_$car$\_$cost with an argument called days. Calculate the cost of renting the car: Every day you rent the car costs $$40.($cost$=40*$days$)$ if you rent the car for $7$ or more days, you get $$50$ off your total$($cost$-=50).$

$$ Alternatively $($elif$),$ if you rent the car for $3$ or more days, you get $$20$ off your total.

$$ You cannot get both of the above discounts. Return that cost.

$$ Finally define a function called trip$\_$cost that takes two arguments, city and days. Like the example above, have your function return the sum of calling the rental$\_$car$\_$cost$($days$),$ hotel$\_$cost$($days$),$ and plane$\_$ride$\_$cost$($city$)$ functions.

$$ Modify your trip$\_$cost function definition. Add a third argument, spending$\_$money. Modify what the trip$\_$cost function does. Add the variable $`$spending$\_$money to the sum that it returns.