please answer all parts to both questions

Solution 2:
The hypotheses are given as follows:
The level of significance is 0.05.
The correlation coefficient calculated is given as follows:
Sample size,
The test-statistic is given as follows:
The critical value at 0.05 level of significance with degrees of freedom is 2.048.
Decision: Since, the calculated value of test-statistic is greater than the critical value (2.818 > 2.048). Thus, the null hypothesis is rejected.
Conclusion: Since, the null hypothesis is rejected, and it concluded that there is significant positive correlation between the amount of alcohol consumed and reaction time.
(b)
The amount of variability in reaction time is explain be amount of alcohol consumed is calculated by taking square of the correlation coefficient.
Thus,
Thus, 22.09% variability explains by amount of alcohol consumed in reaction time.
Solution 3:
The correlation coefficient calculated between the foot length and the leg length of prehistoric animals is 0.49.
The hypotheses are given as...