Help needed to complete my sql group by query

declare @Table1 table (RegNo int, RegName varchar(10))            
insert into @Table1            
select 55,'James'            
union select 56,'Frank'            
            
declare @Table2 table (RegNo int, FeedBack varchar(10), Dated datetime)            
insert into @Table2            
select 55,'Poor','2010-01-17'            
union select 55,'Good','2010-01-18'            
union select 56,'Very Good', '2010-01-17'            
union select 56,'Average', '2010-01-19'            
            
            
select a.RegNo, RegName, FeedBack , Dated             
from @Table1 a            
join (select             
    row_number() over (partition by RegNo order by Dated desc) rownum,            
    RegNo, FeedBack , Dated             
from @Table2) b            
On a.RegNo = b.RegNo            
where rownum = 1