I do not understand how to calculate the partial coefficient (b) with the data I am provided

2. The following is correlation matrix among an Overall Life Satisfaction rating (X), Hours work for pay per week (Y) and age (Z) for a random sample of 82 individuals. X Y Z d. f. = N - 2 = 82- 2 = 180 r= . 2172 X 1.00 -.05 .121 Y -.05 1.00 -.191 Z .121 -.191 1.00 a. Which of the correlations are significant at the .05 level? Explain. none of the correlations are significant at the. 0S level b/C none of them exceeds the critical r (. 2172). b. Calculate the partial correlation coefficient between overall life satisfaction and hours worked for pay, holding age constant, and then determine if this partial correlation is significant