need help badly!!

i'll let the pics do the talking. the 1st one is a plant and the last 2 are a different plant.
any advice would be hugely appreciated!!

thanks everyone!

overwatering,nuteburn,too little light,the list could go on and on and on and on and on and on and on

thanks man. all of my suspicions were correct lol.
so pissed bout this...a few buddies who are living together who know nothing about growing asked me to help them set up a little closet op and pitch in some seeds. so i told em everything i know and what to do but they are soooo lax with everything and dont do any research or shit. for some reason they are so hesitant about putting even a little bit of money into a decent light and nutes. buncha lazy stoners haha.

dont help them grow pot if they only want the end product and not contribute to making the end product a success.

S
O
U
N
D
S

L
I
K
E

Y
O
U
'
R
E

B
E
I
N
G

U
S
E
D

try to get some more light