it would be yo conozco a todos los..
yo means I meaning the conjugation would have to be conozco.
for your information, a conjugation is the adaptation of a er/ir 'to be' verb, to suggest the people performing the verb.
for example..
trabajar- to work
trabajO- i work
trabajas- you work
trabaja- he/she works
I think it’s the first option,, hace fresco
Nos podremos ir de compras cuando hay grandes gangas en las tiendas
Yes mis hermanos están feliz (my brothers are happy and btw if not the answer I need more info)