Sql server find students rank

Question

Hi , this my table student how to find 2 rank of this table

can you write query for this table without total how to find rank

studId studName mark1  mark2   mark3

S001 Raja 60  70           40

S001 Siva         40   79           77

S001 Kumar 80 30          90

S001 Mani 60 70           40

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