At sea level, the dry$-$bulb temperature is $15\backslash$deg C and the wet$-$bulb $9\backslash$deg C$.$ The relative humidity is $45\%.($a$)$ What would be the relative humidity at an elevation of $1,000$m for the same temperatures? Use Carrier's equation. $($b$)$ Repeat for an elevation of $2,000$ m$.$ The correct answers are b$=47\mathrm{.}7\%$ and c$=49\mathrm{.}8\%.$ show me the formula and steps please.