The people in a family are 29, 7, 1, 3, 27 and 5 years old respectively. Calculate:

The mean value of the ages in the family

On a mathematics test, a group of students received the following points: 70, 48, 60, 65, 70, 90, 56, 65, 68, 70, 54, 72, 87, 45, 70. Calculate:

In a family, there are six siblings. The age difference between the five oldest are two years between ever person. The median is 52 years. What is the siblings mean age if the youngest child is 44 years old?