3. Azidothymidine (AZT) is a drug used to prevent and to treat HIV/AIDS. Some results from an early trial of AZT use and AIDS symptoms by Race is given below. Race White Black AZT Use Yes No Yes No AIDS Symptoms Yes No 14 93 32 81 11 52 12 43 (a) Use a DATA step to input this data into SAS. (b) Is there evidence that the association of AZT use and AIDS Symptoms differs by Race? (c) Using your results from part (b) and potentially other analyses, provide summary association(s) for AZT use and AIDS Symptoms.