q1: no. 3.5mm computer audio jacks carry only stereo audio.
data:image/jpeg;base64,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
q2: yes. optical spdif is capable of carrying 7.1 sound.
q3: in general for surround sound there are 3 options. connecting with 3.5mm jacks (for 7.1+ microphone you need 5 plugs), connecting with optical spdif (the one which uses light) or connecting with coaxial spdif (it looks like an orange colored rca jack typically).
also... if an external device such as some headsets have an internal soundcard (inside the product itself) they can connect up to usb instead of from the speaker jacks since they are bypassing your onboard soundcard in this case. i'm not sure if the a40 does this or not as i couldnt find any easy to find reference showing what cable ends it comes with.
from a brief glance it looks like you must connect your headset to the little control box and then connect that to your pc by either spdif or usb... not quite sure perhaps you can elaborate what cables it comes with.