Compare the variables x and z from 2-1 (b) using ==, identical, and all.equal. For all.equal, try changing the tolerance level by passing a third ar‐ gument to the function. What happens if the...

Compare the variables x and z from 2-1 (b) using ==, identical, and

all.equal. For all.equal, try changing the tolerance level by passing a third ar‐

gument to the function. What happens if the tolerance is set to 0? [10]