difference IGL and Coach

so whats the difference between the IGL and the team coach in valorant? since the IGL is the one who makes the tactics, what does the coach do? :)

igl is player. coach is person who created tactics if igl on team doesnt, which igl usually doesnt. only people wo do are shahzam and boaster a bit i think

they spend like 8 hours a day watching other teams and help the igl with coming up with tactics and counterplays against other teams.

coach can't talk to the team ingame except for tac pauses (i presume)