My first grow i think one is showing signs of preflower isit Male or Female?

I bet so many threads have been posted about this, but i have an auto which is showing female preflowers which i recognise as female but also have Sleestack X Skunk which is also showing signs of pre flower well i think its preflower if i knew i wouldnt be asking.
Can any experienced grower clarify for me please i apologise for posting a thread asking a question which most growers would deem obvious but this is my first grow.

well from pic it just looks like new shoots growing... need a better close up

females will have a white v shaped hairs coming out of the calyx, and males don't.

Above post says it all pal

Edit: I think you are right just a new shoot developing.. Not sure though also have another question regarding my other plant. I am using Bio biz nutes low doses to avoid nute damage but some of my plants have brown crispy leaves on them? Very few but still i want NO leaves dieing whatsoever at this stage imo, i did put them in my grow tent two weeks ago and did major stress damage but i thought all the damage had shown still seeing brown/ yellow leaves. Also my friend gave me 3 plants all in very poor condition i have brought them back to an extent but i know they will never produce half as much as they should due to stress and poor growing conditions, they have trippled in size size i've had them but they're budding so slow my auto that's been budding for 3 days has caught with thise other 3 and there alsmost like 2 weeks into budding. Should i give them him back? I get one plant for doing it , what do you think they'll yield??
Edit: I think you are right just a new shoot developing.. Not sure though also have another question regarding my other plant. I am using Bio biz nutes low doses to avoid nute damage but some of my plants have brown crispy leaves on them? Very few but still i want NO leaves dieing whatsoever at this stage imo, i did put them in my grow tent two weeks ago and did major stress damage but i thought all the damage had shown still seeing brown/ yellow leaves. Also my friend gave me 3 plants all in very poor condition i have brought them back to an extent but i know they will never produce half as much as they should due to stress and poor growing conditions, they have trippled in size size i've had them but they're budding so slow my auto that's been budding for 3 days has caught with thise other 3 and there alsmost like 2 weeks into budding. Should i give them him back? I get one plant for doing it , what do you think they'll yield??

Nutes

Deficiency


And finally chuck or keep, all 3 plants look similar; one is purple urkle.

This last pic is a female.

I know that i'm asking the second to last picture.. Does it look like that plant is worth keeping do you think it will produce anything i've turned it round alot it was basically dead when given to me. Any idea about the deficiency?

Actually looks like nute burn. I see some overwatering as well. Calm down on the nutes and let your medium dry a bit more before watering.

-Grish