remote overdub - click-track?

[rbracch]

How are you. I’m wondering if someone could help? My bassist and I recorded a song live to Pro Tools using a click-track. The engineer, though he captured the audio nicely, is a newbie regarding some of the more in-depth aspects of the software. Our song has three separate tracks - lead vocal, acoustic guitar, and electric bass. I’d like to send the song to a friend (in another state) so he can remotely add mandolin to the song. Since I want him to use the same click-track that we used, must I turn that click-track into an audio track and send it to him as a separate .wav file? Or, is that click-track already recorded (but “mute-able” if need be) on one of the original vocal, guitar or bass tracks? Also, when I send him the song, should I “bounce” all three separate tracks (four, if the click-track is included?) to a single .wav file? Take care and thanks so much! - Brock