Please help me find the solution.

Fig. $5$ shows the distribution of potential lines under the base at the end of a stilling basin. The foundation is $3$ m deep with another $3$m of pile sheet wall below. The unit soil weight is y$/$y$`=19/11$ kN$/$m$^3.$

a$)$ Draw the hydraulic failure body and introduce the favorable and unfavorable forces as well as the remaining potential for the exit gradient into Fig$\mathrm{.}5.$Fig. $5$: Potential lines under the base

b$)$ Calculate the before mentioned values.

c$)$ Check for the safety against hydraulic bearing failure.

Partial safety factors: yH $=1\mathrm{.}35$ ; yG$,$stb $=0\mathrm{.}95$