 
 <prompt> ```In four years, Peter go dey twice as old as Harriet. If Peter age na half of im mama age, wey be 60, how old Harriet be now?``` <response>: ```If Peter age na half of im mama age wey be 60, Peter go dey 1/2*60 = 30 years old.
In four years, Peter go dey 30+4 = 34 years old.
Since Peter age in four years go be twice Harriet age, Harriet go dey 34/2 = 17 years old in four years.
Currently, Harriet dey 17-4 = 13 years old.

Answer na 13.``` 