1. In the table from problem #2, what is the level of employment at which diminishing returns begin? What happens to the marginal product of labor and to marginal cost at this employment level?
2. Using the table from problem #2, answer the following questions:
   1. Marginal cost equals minimum AVC between what two employment levels?
   2. Marginal cost equals minimum ATC between what two employment levels?

L	K	TP	AP	MP	TVC	TFC	TC	AFC	AVC	ATC	MC
0	20	0	--	-	0	80	80	--	--	--	--
1	20	10	10	10	6	80	86	80	6	8.6	0.6
2	20	30	15	20	12	80	92	40	6	3.066667	0.3
3	20	60	20	30	18	80	98	26.66667	6	1.633333	0.2
4	20	100	25	40	24	80	104	20	6	1.04	0.15
5	20	150	30	50	30	80	110	16	6	0.733333	0.12
6	20	210	35	60	36	80	116	13.33333	6	0.552381	0.1
7	20	280	40	70	42	80	122	11.42857	6	0.435714	0.085714
8	20	360	45	80	48	80	128	10	6	0.355556	0.075
9	20	450	50	90	54	80	134	8.888889	6	0.297778	0.066667
10	20	550	55	100	60	80	140	8	6	0.254545	0.06
11	20	640	58.18182	90	66	80	146	7.272727	6	0.228125	0.066667
12	20	720	60	80	72	80	152	6.666667	6	0.211111	0.075
13	20	790	60.76923	70	78	80	158	6.153846	6	0.2	0.085714
14	20	850	60.71429	60	84	80	164	5.714286	6	0.192941	0.1
15	20	900	60	50	90	80	170	5.333333	6	0.188889	0.12
16	20	940	58.75	40	96	80	176	5	6	0.187234	0.15
17	20	970	57.05882	30	102	80	182	4.705882	6	0.187629	0.2
18	20	990	55	20	108	80	188	4.444444	6	0.189899	0.3
19	20	1000	52.63158	10	114	80	194	4.210526	6	0.194	0.6