问答题 用你自己作为劳动力的经历来回答下列问题：
   a．当你和你的朋友找一份兼职工作时，一般需要几周?在你找到一份工作之后，一般能持续工作多少周?
   b．根据你的估计，计算(按每周的比率)你的就业率．厂与你的离职率s。(提示：如果f是就业率，那么平均失业的时间长度就是1/f)
   c．你所代表的人群的自然失业率是多少?
   Answer the following questions about your own experience in the labor force:
   a．When you or one of your friends is looking for a part-time job, how many weeks does it typically take? After you find a job, how many weeks does it typically last?
   b．From your estimates, calculate (in a rate per week) your rate of job finding f and your rate of job separation s. (Hint: If f is the rate of job finding, then the average spell of unemployment is 1/f)
   c．What is the natural rate of unemployment for the population you represent?