Question 10 . P. researcher is examining the relationship between stress levels and performance on a test of cognitive performance .She hypothesizes that stress levels lead to increase in performance to a point , and then increased stress decreases performance .She tests ten participants ,who have the following levels of stress : 10.94 , 12.?6 , 2.62 , 8.1? , 2.83 , 12.22 , 9.23 , 11.1? , 11.88 , and 8.18 . When she tests their levels of mental performance , she finds the following cognitive performance scores [listed in the same participant order as above ]: 5.24 , 4.64 , 4.63 , 5.04 , 4.1T , 6.20 , 4.54 , 6.55 , 5.79 , and 3.1? . a. Name the Independent variable [IV] and the Dependent variable {DU}. b. Choose and perform the most suitable analysis to test the above hypothesis c. Create a graph to demonstrate the relationship between the two variables d. Report and explain the results . Question 11 . The same researcher tests ten more participants ,who have the following levels of stress :16, 20, 14, 21, 23, 19, 14, 20, 1?, and 10. Their cognitive performance scores are [listed in the same participant order ).Coincidentallv ,these participants have the same cognitive performance scores as the participants in question 4. a. Perform a linear regression to examine the relationship between these variables b. What do these results suggest? Question 12 . Create a scatterplot of the variables in Question 11. How do results suggest that linear regression might not be the best analysis to perform ? Question 13 . Describe the steps to be followed in SPSS to run a correlational analysis with 4 normallv distributed variables