thank you for the extra help I really need to understand how to do these not just the answer.

Test a claim that the mean amount of lead in the air in US. cities is less than 0.036 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of 55 US, cities is 0.038 microgram per cubic meter and the standard deviation is 0.068 microgram per cubic meter. At a = 0.05, can the claim he supported? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Identify the claim and state H0 and Ha. w] u \"a: l'l 'l (Type integers or decimals. Do not round.) The claim is the l hypothesis. (b) Find the critical value(s) and identity the rejection region(s). The critical value(s) islare to = (Use a comma to separate answers as needed. Round to two decimal places as needed.) Choose the graph which shows the rejection region. OA- 03- 06. OD. e\" a o\" a tr0 ' "o'l'lo * \"to , \".0 , a a Q Q I3" 'IZI [l3 E": t 7 t V t ' I ' 4 400 10 4 4 roo to 4 .4 o to 4 4 to o 4 (c) Find the standardized test statistic, t. The standardized test statistic is t= ( d ) Decide whether to reject or fail to reject the null hypothesis . ~| Ho because the standardized test statistic\\ *\\ in the rejection region . ( @ ) Interpret the decision in the context of the original claim* There\\ \\} | enough evidence at the| % level of significance to *\\ the claim that the mean amount of lead in the air in U. S . cities is *\\\\ microgram per cubic meter . ( Type integers or decimals . Do not round . )