Carlo used this number line to find the product of 2 and −3. A number line going from negative 7 to positive 3. An arrow goes from negative 2 to negative 4, and from negative 4 to negative 6.

What errors did Carlo make? Select two options.
The arrows should each be a length of 3.
The arrows should be pointing in the positive direction.
The arrows should start at zero.
The arrows should point in the negative direction.