Here lies Diophantus, the wonder behold......
Through art algebraic,the stone tells how old;
God gave him his boyhood 1/6 of his life,
1/12 more as youth while whiskers grew rife;
And the 1/7 ere marriage begun;
In five years there came a bouncing new son.
Alas, the dear child of master and sage.
After attaining half of his father's age,
Chill fate took him.
Grieved and full of tears,
He passed on after four years.
Find Diophantus' age at death. (Source from textbook)