Adobe Media Encoder .mp4 container with PCM audio

Hi Adobe family,

I'm hoping someone can help me with this it's been driving me nuts. I have been asked to supply a video to a Media agency for compliance checks before it can go live. They have requested the below specs

Video

Resolution (SD format): 720 x 576

Aspect ratio 16:9 PAL

Frame rate 50 field/s, 25 frame/s

.mp4 container

file size: Under 10mb

Audio

Original Format PCM audio (not including Dolby E or AC-3)

Sampling rate 48kHz

Stereo Lt Rt

Where Dolby Digital (DD) derived mixed down Rt Lt

My source file is a 1920x1080 HD file with PCM audio. The whole project length is 28 seconds, and I'm exporting from After effect because I had to do some title changes and a few other tweaks etc.

Firstly is there even a way to encode a .mp4 with PCM audio direct from media encoder? Or are these guys just smoking the fun stuff? Because if there is a way I for the life of me cannot find how to make this work with the h.264 codec direct from AME. Secondly to get below a 10mb file surely there is no way of doing this even if I was able to include uncompressed audio or am I missing something.

I would LOVE someone that has used AME extensively or by some miracle someone from Australia who has had to request CAD approval for a TVC who can help with these settings.

Thank you to everyone in advance who might offer help