After effects quick edit

I have this ad : https://www.dropbox.com/s/9a7cxc9dufecigu/Edited%20Intro.mp4?dl=0
done with a videohive template. I need to move the music 2sec left & on the first 4 slides add a small logo to the bottom .

I have the after effect files available

Export settings can be found here:
https://www.dropbox.com/s/v1le1u17fx69sba/PBS%20%20%20----%20%20%20%20%20QUALITY%20SPECIFICATIONS.pdf?dl=0