The answers to the questions are 6.15, 6.15, ph-neutral, 9.3, and 3 but I would just like the steps and explanations as

[answerhappygod]

The answers to the questions are 6.15, 6.15, ph-neutral, 9.3,
and 3 but I would just like the steps and explanations as to why
those are the answers please!
The question states
As with all other equilibrium constants, the value
of Kw is a function of temperature.
Suppose Kw is 5.0 ×
10−13 at some temperature.
1. Calculate pH and pOH for pure water at this mystery
temperature.
pH =
pOH =
2. Suppose you have a solution with a pH of 6.15 at this mystery
temperature. Is that solution acidic, basic, or
pH-neutral?
3. Calculate the pH and pOH of a 0.0010 M NaOH solution at
this different temperature.
pH =
pOH =