Consider the calculation x - y+(-z) where x and z are positive real numbers and y is a negative real number. i) What are the directions of motion for this calculation?

ii) is the final answer positive, negative, or undetermined?

i) Right, right, left
ii) Positive

i) Right, left, left
ii) Undetermined

i) Right, left, left
il) Negative

i) Right, right, left
ii) Undetermined