I've a dataset with ID and timestamp.

Each ID mostly has 12 observations of time stamp for each minute.
I 'm having a hard time adding 5 seconds interval to each timestamp for each minute. 

```
Actual Data                     Desired Format

    ID       Time           ID        Time     
    4466    12/1/14 19:56   4466    12/1/14 19:56:00
    4466    12/1/14 19:56   4466    12/1/14 19:56:05
    4466    12/1/14 19:56   4466    12/1/14 19:56:10
    4466    12/1/14 19:56   4466    12/1/14 19:56:15
    4466    12/1/14 19:56   4466    12/1/14 19:56:20
    4466    12/1/14 19:56   4466    12/1/14 19:56:25
    4466    12/1/14 19:56   4466    12/1/14 19:56:30
    4466    12/1/14 19:56   4466    12/1/14 19:56:35
    4466    12/1/14 19:56   4466    12/1/14 19:56:40
    4466    12/1/14 19:56   4466    12/1/14 19:56:45
    4466    12/1/14 19:56   4466    12/1/14 19:56:50
    4466    12/1/14 19:56   4466    12/1/14 19:56:55
    1136    3/23/15 23:00   1136    3/23/15 23:00:00
    1136    3/23/15 23:00   1136    3/23/15 23:00:05
    1136    3/23/15 23:00   1136    3/23/15 23:00:10
    1136    3/23/15 23:01   1136    3/23/15 23:01:00
    1136    3/23/15 23:01   1136    3/23/15 23:01:05
    1136    3/23/15 23:01   1136    3/23/15 23:01:10
    1136    3/23/15 23:01   1136    3/23/15 23:01:15
    1136    3/23/15 23:01   1136    3/23/15 23:01:20
    1136    3/23/15 23:01   1136    3/23/15 23:01:25
    1136    3/23/15 23:01   1136    3/23/15 23:01:30
    1136    3/23/15 23:01   1136    3/23/15 23:01:35
    1136    3/23/15 23:01   1136    3/23/15 23:01:40
    1136    3/23/15 23:01   1136    3/23/15 23:01:45
    1136    3/23/15 23:01   1136    3/23/15 23:01:50
    1136    3/23/15 23:01   1136    3/23/15 23:01:55

```