67% of workers got their job through networking. A researcher thinks it has increased. a) Express the null and alternative hypotheses in symbolic form for this claim. Enter your answer as a decimal. For example, if you have 35%, enter 0.35. H0:H0: Ha:Ha: Use the following codes to enter the following symbols: enter >= enter <= enter != b) You decide to survey 100 adult Americans and find that 87 of workers got their job through networking. Find the test statistic. Round to two decimal places. z=z= c) What is the p-value? Round to 4 decimals. p=p= d) Make a decision base on a 0.05 significance level.