The average age of a family of five is equal to 50 years in the year 2010. In 2015, the eldest person in the family died and at the same time a new child was born. Later, the average age of the family in 2019 is 45 years. If the eldest person in the family was alive in 2019, what would have been his age?
1
72 years
2
74 years
3
68 years
4
75 years