A 2015 survey shows that 44% of Snapchat users are between 18 and 24 years old. Suppose a follow-up survey were recently conducted to investigate if the proportion had changed and that out of a random sample of 225 Snapchat users, it found that 121 users were between 18 and 24 years old. Using a = 0.10, complete parts a through c. a. State the null and alternative hypothesis. Let p be the population proportion. Determine the null hypothesis, Ho, and the alternative hypothesis, H,. Ho: P = 0.44 H, : p # 0.44 (Type integers or decimals. Do not round.) b. What conclusions can be made about the proportion of Snapchatters between 18 and 24 years of age? Identify the critical value. Za/2 (Round to two decimal places as needed.)