"Father and Son" is a popular song written and performed by English singer-songwriter Cat Stevens (now known as Yusuf/Cat Stevens) on his 1970 album Tea for the Tillerman.
Stevens sings in a deeper register for the father's lines, while using a higher one for those of the son..
this lesson and 200+ more on patreon.com/ukuleleroadtrips
you can download the backing track here