Implement the _ _sub_ _ method for the Vector class of Section 2.3.3, so that the expression u−v returns a new vector instance representing the difference between two vectors. Implement the _ _neg_...

Implement the _ _sub_ _ method for the Vector class of Section 2.3.3, so

that the expression u−v returns a new vector instance representing the

difference between two vectors.

Implement the _ _neg_ _ method for the Vector class of Section 2.3.3, so

that the expression −v returns a new vector instance whose coordinates

are all the negated values of the respective coordinates of v.