Slide the "Strings_1A" regions so that they start playing at about 00:00:28.00, which should leave plenty of room for the sound of the chairs, if you decided to keep it.

The "Strings_4" region begins in the same way that the "Strings_1A" regions end. Listen to both, and choose which you prefer, then use the position of the sounds in the "Strings_1A" region to guide your trimming and alignment of the "Strings_4" region.

The other two strings regions contain the same musical material as the "Strings_1A" region. We can't decide between them yet, so move them both past the end of the concluding marimba regions, so they won't be heard.