Could you show the steps please, thanks in advance

Problem 2

a- What is the difference between type I and type II errors, the null hypothesis, the alternative hypothesis, and a one-tailed test and a two-tailed test in hypothesis testing?

b- A chocolate bar has an average weight of 150 mg, so the manufacturer wants as many chocolate bars as possible to contain 150 mg. Based on a sample of 500 chocolate bars, the average weight is 148.86 mg, and the standard deviation is 8.7 mg. Analyze whether the results are significant at a 5% level using a one-tailed test.