The name is in column B, the student number is in column C and the class is in column D.. The first line is the title.
B2 formula
=vlookup(c2，sheet 1！ A: C, 2, 0)
D2 formula
=vlookup(c2，sheet 1！ A: C, 3, 0)
then
Copy B2 merged cells, click B6 and b10 ... cells with ctrl+ mouse, and then paste.
Copy D2 merged cells, ctrl+ click D6, d10 .................................................................................................................................................