Please Answer both problems and all parts of problem $2.$ Step$-$by$-$Step would really be appreciated.

Problem $1$: Determine the maximum threshold stagger dimension X in the layout below.

Problem $2$:

Given:

$-$Single runway airport with CAT I approach, RDC C$-$III$-2400$

$-$Airport elevation is $3000$

V$-$isiting aircraft is A$300-$B$4$

a$.$ Determine the holdline location based on standards for RDC C$-$III$-2400.$

b$.$ Determine the parallel taxiway separation based on standards for RDC C$-$III$-2400.$

c$.$ Can the A$300-$B$4$ hold at the standard holdline if another A$300-$B$4$ is on the approach to the runway? Support your answer with calculations. Determine Tail Height of A$300-$B$4$ and compare to I$-$OFZ Height at the holdline location.

d$.$ Is the standard parallel taxiway separation sufficient for safe operation of the A$300-$B$4$ while another A$300-$B$4$ departs the runway? Support your answer with calculations. Check that the Wingspan of A$300-$B$4$ does not overhang the RSA. Check Tail Height of A$300-$B$4$ versus I$-$OFZ Height at parallel taxiway location.

Thank you!