For this case we have the following vectors:

The dot product of two vectors is a scalar.
The point product consists of multiplying component by component and then adding the result of the multiplication of each component.
For the product point of the vectors a and b we have:
Answer:
The product point of the vectors a and b is:
I think its the first one
First change the 1/2 to eighths. multiply numerator and denominator by 4.now subtract 4 1/8