Extracting information from objects

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// Write a function that takes an object as argument containing properties with personal information
// Extract firstName, lastName, size, and weight if available
// If size or weight is given transform the value to a string
// Attach the unit cm to the size
// Attach the unit kg to the weight
// Return a new object with all available properties that we are interested in
			function
				myFunction
				(
				obj
				)
				{
			
				
				
return 

			}

Test Cases:

myFunction({fn: 'Lisa', ln: 'Müller', age: 17, size: 175, weight: 67})

Expected

{fn: 'Lisa', ln: 'Müller', size: '175cm', weight: '67kg'}

myFunction({fn: 'Martin', ln: 'Harper', age: 26, email: 'martin.harper@test.de', weight: 102})

Expected

{fn: 'Martin', ln: 'Harper', weight: '102kg'}

myFunction({fn: 'Andrew', ln: 'Harper', age: 81, size: 175, weight: 71})

Expected

{fn: 'Andrew', ln: 'Harper', size: '175cm', weight: '71kg'}

myFunction({fn: 'Matthew', ln: 'Müller', age: 19, email: 'matthew@mueller.de'})

Expected

{fn: 'Matthew', ln: 'Müller'}