in Swift on xcode$/////////////////////////////////////////////////////////////////////////$

Chapter $8$ Special Instructions

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$//$ Define and print an "Optional Type" String variable called "flightNumber"

$<<$ YOUR CODE GOES HERE $>>$

$//$ Use "Forced Unwrapping" to print the flightNumber

$<<$ YOUR CODE GOES HERE $>>$

$//$ Define and print and optional type that contains nil called "destination"

$<<$ YOUR CODE GOES HERE $>>$

$//$ Use "Unwrapping Multiple Optionals" for "destination" & "origination"

$//$ Define "origination" to $"$DTW$"$ which is Detroit Metro and destination is "AUA"

$<<$ YOUR CODE GOES HERE $>>$

$/$ Use "Implicitly Unwrapped Optionals" for "roundTripAmount"; data type is Float

$//$ Use optional binding to print and format the amount

$<<$ YOUR CODE GOES HERE $>>$

$//$ Use "Optional Chaining" to define and print "flightStatus" to "cancelled", lowercase

$<<$ YOUR CODE GOES HERE $>>$

$//$ "Modify an Optional in Place" by "append"ing $"$A$.$M$."$ to a variable called "departure"

$//$ Define variable to $7$:$15$

$<<$ YOUR CODE GOES HERE $>>$

$//$ Use "The Nil Coalescing Operator" to validate the "arrival" is nil

$<<$ YOUR CODE GOES HERE $>>$