Can you help me with cutting and rpm parameters?

Good night guys.

I'm from Mexico so sorry if my english is not proficient enough but...
I need your help with one of my own works, I don't have any idea of RPMs and cutting parameters, the piece area is around 150 mm x 155 mm in aluminium.
I made a desing in Mastercam and export de NC code for a Fanuc 0-MD control but I don't know too much about cutting parameters.
I have 3 processes:
Facing - flat endmill 1/2''
Reducing material - ball endmill 6mm
Final form - taper mill R0.5X20.5X50 D4 tip R=0.5mm of 4 mm ~ 6 mm

I used Mastercam for that and G21 so my inputs are in "mm".

Can you help me with spindle speed and feed rate please?

See the attachments.

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