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+## Trace #1
+* mystery1(5) = 15
+* mystery1(10) = 55
+*  mystery1(0) = stack too deep/infinite recursion
+
+## Trace #2 
+=> summation of digits
+* mystery2(123) = 6
+* mystery2(9005) = 14
+* mystery2(-123) = -123
+
+## Trace #3 
+=> 100 if n >= 0, 200 if n < 0
+* mystery3(1) = 100
+* mystery3(13) = 100
+* mystery3(-6) = 200
+
+## Trace #4 
+=> b^e
+* mystery4(10,2) = 100
+* mystery4(4,3) = 64
+* mystery4(5,0) = 1
+
+## Trace #5 
+=> number of stars equal to the string length
+* mystery5("hi") = "**"
+* mystery5("") = ""
+* mystery5("Hi, there!") = "**********"
+
+## Trace #6
+=> reverses the words with a space in front of each word
+* mystery6("goodnight moon") = " moon goodnight"
+* mystery6("Ada Developers Academy") = " Acadeny Developers Ada"
+* mystery6("Hi, there!") = " there! Hi,"