Added json data and global variables.
Create preFlight object with boolean, array, number, string, and object properties.
Build checkWeather function as a accessor.
Build setClearance mutator.
Added the preFlightCheck function that passes an object.
Added the addPlane function that mutated the plane object and returns the updated object.
Adding the function runUpProblems which includes passing and returning an array.
Add checkVisibility function that passes and returns a number.