Thead/Tfoot/Tbody

 
thead Row 1;      
      background-color: cyan;     text-align: center;
tbody Rows 2,3,4; background-color: #9999ff; text-align: right;
tfoot Rows 5, 6; background-color: #ff99ff; text-align: center;
R1C1 R1C2 R1C3 R1-2C4 R1C5
R5C1 R5C2 R5-6C3 R5-6C4 R5C5
R6C1 R6C2 R6C5
R2C1 R2C3 R2C3 R2C5
R3C1 R3C2 R3C3-5
R4C1-3 R4C4 R4C5