Need help these problems for my statistics class.

8. (10 points) Sample Space. Brad has three different types of coins (one of each) in his pocket; quarter7 dime, and nickel. From his pocket he will draw out two coins one at a time without replacement. (a) (4 points) Write out the sample space for the experiment of Brad drawing out two coins from his pocket one at a time without replacement. (b) (3 points) What is the probability the two coins he will draw are worth exactly 30 cents? (c) (3 points) What is the probability the two coins he will draw are worth more than 50 cents? 7. (10 points) Regression. Crickets make a chirping noise by sliding their Wings rapidly over each other. Perhaps you have noticed that the number of chirps seems to increase With the temper- ature. The following data list the temperature (in degree Fahrenheit) and the number of chirps per second for the striped ground cricket. The regression equation and correlation coefcient are given in the problem. Temperature, :0 Chirps per second, 3/ Temperature, x Chirps per second, y 92.6 21.0 71.6 16.7 90.3 19.3 84.3 18.4 80.6 17.1 85.1 17.5 73.7 15.1 82.2 17.1 79.4 17.4 83.3 16.4 79.6 15.0 81.6 15.2 80.6 15.8 83.5 17.0 76.3 14.4 (a) (4 points) Determine the least square regression equation. (b) (2 points) Calculate the residual when the temperature is 85.1F. (c) (2 points) Interpret the slope in the context of the problem. (d) (2 points) Interpret the y-intercept in the context of the