Hi

Let a be Ann's age and b her father's age

a+b=56

In four years Ann will be a+4 and her father b+4

b+4 = 3(a+4)

b+4=3a+12

b=3a+8

a+b=56

a+3a+8=56

4a+8=56

4a=48

a=12

b=56-4=44

Ann is 12 years old and her father is 44 years old

In 4 years she will be 16 years old and her father 48 which is 3 times 16