Q$1.$ The basic length of a runway under standard conditions is $1600$ m $.$ The airport is to be provided at an elevation of $410$ m above mean sea level. The mean of average daily temperature and maximum daily temperature for the hottest month of the year are $\backslash (21\mathrm{.}5^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ and $\backslash (42\mathrm{.}8^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ respectively. The level data of airfield is as follows:

Explain the rections as per ICAO and FAA specifications.