Help please

Researchers want to examine whether there is a relationship between height and running speed in children. To studyr this question, the;r select a random sample of eight elementary school children. measure their height, and time them mnning a 40- yard dash (in seconds}. The researchers was to test at a significance level of .05. The height and running speeds are: What is the critical value of r? O r= 0.666 O r= 0.745 O r= 030? O r= 0.632