Which statement(s) are incorrect about Fractional Factorial Designs?

A Half Fractional Design for 5 factors has the same number of experimental runs as a Full Factorial Design for 4 factors assuming no repeats or replicates or Center Points

Quarter Fractional experiments can exist for those with 4 factors

Resolution V design is desired while controlling costs of experimentation

Half Fractional experiments do not exist for those designs with only 2 factors