Hi<br/><br/><i>He was a difficult, stubborn child.</i><br/><br/><i>He was a difficult and stubborn child.</i><br/><br/><i>He was a difficult, stubborn and fussy child.</i><br/><br/><i>He was a difficult and stubborn and fussy child.</i><br/><br/><i>He was a difficult, stubborn, fussy child.</i><br/><br/>Are all the above sentences correct?