Create a class, airtravelcost, that has the following characteristics: •attributes of departure/arrival date (stringin the form mmdd), departure/arrival time (stringin the form hhmm), destination, travelfare, and hotelcost(cost per night). •a constructor that accepts and updates all the attributes•a normal accessor for destination•durationcan be calculated. use the gregoriancalendar class. ocreate two gregoriancalendar objects, one for each of the departure and arrival dates and times. ouse the gettimeinmillismethod to get a date/time in milliseconds since a standard date & time. osubtract the two values (for the departure and arrival date/time) to yield duration in milliseconds. odivide the result by 60,000to get minutes and divide again by 60to get hours, etc. •calculate the lodging (hotel) cost by dividing the durationby 24hours and use the number of whole days only (no partial days). multiply the number of days by the hotel cost per night. •the total cost can be calculated as travelfare + getlodgingcost() + agent_fee•a tostringmethod returns a string formatted by string. format()who’s output looks like "air travel to destinationwill take durationand cost totalcost"