can some one help me find the answers for A B and C please

Interpret es 7.18 Corporate sustainability of CPA firms. Corporate sustain. is D ability refers to business practices designed around social p- SUSTAIN and environmental considerations. Refer to the Business d. and Society (Mar. 2011) study on the sustainability behav- ti- iors of CPA corporations, Exercise 2.105 (p. 77). Recall that the level of support for corporate sustainability (mea- sured on a quantitative scale ranging from 0 to 160 points) was obtained for each in a sample of 992 senior managers at CPA firms. Higher point values indicate a higher level of support for sustainability. The accompanying MINITAB printout gives a 90% confidence interval for the mean level of support for all senior managers at CPA firms. Variable N Mean StDev SE Mean 90$ CI Support 992 67. 755 26.871 0. 853 (66. 350, 69.160) a. Locate the 90% confidence interval on the printout. b. Use the sample mean and standard deviation on the printout to calculate the 90% confidence interval. Does your result agree with the interval shown on the printout? nem wolf .smil c. Give a practical interpretation of the 90% confidence interval