please help me all parts below

Note: L$1=5\mathrm{.}9$m$,$ L$2=5\mathrm{.}0$m$,$ Dead load P$=850$kN$,$ Live load Q$=600$kN$.$ a$)$ Calculate member forces for M$1$ and M$2.$ b$)$ Design member M$1$ and M$2$