this isnt 100% correct based the chords on the bass tab
this is the first part of the first verse play this twice
e|--------------------------------------|
B|--------------------------------------|
G|---------44-4-4-4---------------------|
D|22-2-2-2-44-4-4-4-66-6-6-6-66/4-4-4-4-|
A|22-2-2-2-22-2-2-2-66-6-6-6-66/4-4-4-4-|
E|00-0-0-0----------44-4-4-4-44/2-2-2-2-|
this is the second part of the first verse play twice
[ Tab from: https://www.guitartabs.cc/tabs/g/gym_class_heroes/7_weeks_tab.html ]
e|------------------------------------------------------------|
B|---------12 12-12-12-12-------------------------------------|
G|99-9-9-9-10 10 10 10-10-13 13-13-13-13-11 11-11-11-11-------|
D|99-9-9-9-9- 9- 9- 9- 9--13 13-13-13-13-11 11-11-11-11-------|
A|77-7-7-7----------------11 11-11-11-11-9 9- 9- 9- 9--------|
E|------------------------------------------------------------|
this is the chorus play the whole lot twice
e|----| |----| |----| |----|
B|4444| |----| |----| |4444|
G|4444| x2 |----| x2 |3333| x2 |4444| x2
D|4444| |6666| |4444| |4444|
A|2222| |6666| |4444| |2222|
E|----| |4444| |2222| |----|
and repeat the whole tab a few times nd thats it thanks