CREATE TABLE table_name_21 (position VARCHAR(255), main_contestant VARCHAR(255), scores_by_each_individual_judge VARCHAR(255))
What position is there when the main contestant is Vishal Singh and the scores are 1 + 7 + 5 = 13?
    
SQL: SELECT position FROM table_name_21 WHERE main_contestant = "vishal singh" AND scores_by_each_individual_judge = 1 + 7 + 5 = 13