Froblem $5-5.$ Repeat Prob. $5-1$ by first plotting the failure loci in the ${}_A,{}_B$ plane to scale; then, for each sfreststate, plot the load line and by graphical measurement estimate the factors of anfely.

$4.{}_x=100$MPa,${}_y=100$MPa

B$.o_x=100$MPa,${}_y=50$MPa

C$.{}_x=100$MPa${}_{xy}=-75$MPa

D$.{}_4=-50$MPa,${}_y=-75$MPa,${}_{xy}=-50$MPa

B$.{}_x=100$MPa,${}_y=20$MPa,${}_{xy}=-20$MPa