Gregorio took two tests. Find his z-score for each test. (Remember: The number of standard deviations between a score and the mean score is indicated by a z-score.) On which did he score better compared with others in his class? Test ATest BGregorio’s score6270Mean score8090Standard deviation610a.Test A: 3; Test B: 2; Test Ac.Test A: –2; Test B: –3; Test Ab.Test A: –3; Test B: –2; Test Bd.Test A: –3; Test B: –2; Test A