Assume the side effect of drug in patients is known to be .75 with and standard deviation is to be .9. The drug company is trying to reduce the side effect factor by adding an extra chemical on drug. It is also believed that standard deviation of side effect of the new drug remains unchanged. 25 patients were given new drug and the mean side eect factor is found to be .73. Then, test the appropriate null hypothesis and also ne the Type I error and Type II error.