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The following results were obtained with respect to two variable x and y :$\sum x=30,\sum y=42,\sum xy=199,\sum x^2=184,\sum y^2=318,n=6.$

Find the following : 

(i) The regression coefficients.

(ii) Correlation coefficient between x and y.

(iii) Regression equation of y on x.

(iv) The likely value of y when x=10.

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