Excel VBA bubble sort 2 key sorts

[Excelgreenhand]

I would like to use bubble sort (I am ok with only one sorting key) for my Excel data in an array as this
a 10
b 5
a 2
a 5
b 2
and the result to be like this
a 2
a 5
a 10
b 2
b 5
Can it be accomplished? How about 3 sorting keys (or more)
Thanks.

 

[Excelgreenhand]

Again thank you.
I would put more efforts on the material directed and received.
Salute!