Experimenting with algorithm solutions

Good Array: -4,3,-9,0,4,1
0.500000
0.333333
0.166667
Empty Array: []
Error: input array of integers is required
String: 'happy'
Error: input array of integers is required
Big Array: -4,3,-1000,0,4,1
Error: input array integers must be between -100 and +100