for items 11-15.let u as universal set: U=(1,2,3,4,5,6,7,8,9,10)
P=(135)
Q=(235)
R=(246)

15. what is P U R?
a. 1,2,3,4,5,6
b.1,5
c.2,3,5
d.2,4,6
pa help po thanks!​