Let mylist=list(sex = c(1,1,1,1,2,2,2,2,2,2), smoking = c(1,0,1,0,1,0,1,0,1,1), age=c(21:30)). Give the results of these R commands:

1) x = lapply(mylist, max); print(x); y = sapply(mylist, min); print(y)

2) z = mapply(function(p1,p2,p3){c(p1,p2,p3)}, mylist$sex, mylist[[2]], mylist[['age']]); print(z)

3) class(x); class(y); class(z)

Please explain the difference among x, y and z in terms of the above results briefly.