Do I need steroids for these?

So here are my "relatively short term goals".







Squat (Olympic style), 455 pounds for 1 rep



Squat (Olympic style), 315 pounds for 30 reps (I want extreme endurance)



Power clean, 245 pounds for 10 reps







All of the above I wish to do at less than 240 pounds in bodyweight.







Realistic if natural?



Or you think I need to juice?

Do I need steroids for these?