macro to close excel file and open another excel file

Hi guys,
I have a slight problem. I have created several excel files as I cannot open them all at once since they are too large. So I have to open one excel file whilst closing another.

part1
part2
part3
part4
part5

I want a macro that opens the excel file part 1 and part 2. Then it should close part 1 and after closing part 1 it should open part 3. Once part 3 is open, part 2 should be closed and when part 2 is closed part 4 should open. When part 4 is open, then part 3 should be closed and part 5 should open.

Do you guys think that such a macro can be created?