(I chose one of the three options, because when I asked how many where there; I got no answer)
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I believe the answer is <span><em>public schools start at 9 AM every day</em></span>.
<em>Option 1</em><em> RIGHT</em>
I think the answer is the first one because I went to public schools and I noticed that.
<em>
Option 2 </em><em>WRONG</em><em />
I think the second option isn't right because public schools' basic subjects are studied in english.
<em>
Option 3 </em><em>WRONG</em>
It's wrong because most people live near the school that they can go by walking and/or biking.
Answer:
Todos nadamos / Todos nadan (We all swim (Todos nadamos) and You all swim (todos nadan))
Yo no (Not me or no, me would be either yo no or no yo depending on what you want to say (Can I get some context?))
A la semana
los días
nado tres veces (I swim three times (tres veces is perfectly fine))
Explanation:
All were correct depending on what you wanted to say, since I didn't get any context.