Peter is 3 years older than Wayne who is 37 so Peter is 37+3 = <<37+3=40>>40 years old
Julia is 2 years older than Peter who is 40 so Julia is 2+40 = <<2+40=42>>42 years old
It's 2021 and Julia is 42 years old so she was born in 2021-42 = <<2021-42=1979>>1979
#### 1979