Please answer correctly, ASAP

A vertical sheet pile is to support horizontal backfill $7\mathrm{.}5$ m high of Ka $=0\mathrm{.}361$ and Kp $=2\mathrm{.}77.$ Unit weight of backfill is $18\mathrm{.}15$ kN$/$m$3/$

An anchor bolt is placed $1\mathrm{.}2$ m below the top of sheet pile $($anchor bolt is used the wall from lateral movement due to active

pressure of the soil$).$ a$)$ Compute the location of zero stress on the sheet pile base from the degree line

b$)$ Compute the minimum length of embedment of sheet pile

c$)$ Compute the tension at the anchor bolt