Lower Control arms - replace bushing or whole arm?

So like a handful of you all it sounds like my passenger side cam bolt sleeve is seized inside of the bushing (passenger front closest to the front bumper).

Question 1) Can the stock arm bushings be replaced fairly easily once the arm is removed?

Question 2) Can I replace the stock bushings with poly's in the stock arms?

Question 3) Would it be way easier to just replace the arm completely so it comes with all new bushings and lower ball joint?