100 free best time 58.00, plus 3 seconds would be out in 1:01ish plus 3 seconds for second 100 would be 1:04ish for back 1/2 100. 200 free time would be in the 2:05 low to 2:06ish.
100 BT plus 3 equals first 100 split
First 100 split plus 3 equals 2nd 100 split