In R, for given matrix x

[,1] [,2] [,3]

[1,] 5 7 0

[2,] 7 9 8

[3,] 4 6 7

[4,] 6 3 5

y <- apply(x, 1, sum)

z<- apply(x, 2, sum)

plot(y,z)

1. Explain execution of script?
2. What would be output?