4 A biologist is comparing the intervals (m seconds) between the mating calls of a certain species of tree frog and the surroundings temperature (t C). the following results were obtained. (15 Marks) tC 8 7 m secs 6 4 11 6 12 15 18 25 23 8 3 8 6.5 2 a- Find the equation of the regression line of m on t giving your answer in the form m= a + bt (12 Marks) b- Use your regression line to estimate the time interval between mating calls when the surrounding temperature is 11 C. (3 Marks)