Which archive type is .ark?

["Charles T. Turley" <cturley@wco.com>]

I need help to learn what archive program I should use to dearchive a 
file with (.ark). See reference below!

D2:","<CPMUG>","CPMUG083.ARK",1,96068,8,850210,"MuMath/MuSimp, CBASIC 
routines,F-80 functions"

http://oak.oakland.edu/pub/cpmug/cpmug083.ark

I've downloaded the above archive (I'm hoping it's the CP/M archive of 
MuMath for use as a 5.25 CP/M disk on the Apple II). I'd be grateful for 
any info to help me determine what archive program is needed to 
dearchive this file and if it's actually the CP/M disk archive - as 
noted above.

TIA,
Tom