. What percent of total variance is accounted for by the first three principal components? (Show your final answer as a percentage point with 2 decimal places.)

b. What are the weights for computing the first principal component scores? (Round your final answers to 4 decimal places. Negative values should be indicated by a minus sign.)

c. What is the first principal component score for the first observation? (Round your final answer to 4 decimal places.)

x1	x2	x3	x4
-1.552272539	-6.825797635	4.243252958	9.744243502
15.8069516	5.812264252	-7.799706519	-3.07344671
-1.666213335	1.432105813	-9.698185187	-6.277207127
15.17371574	3.484750583	-3.614180085	0.316266615
-3.894894793	-9.631608566	-0.199809256	-5.234990951
-2.667063169	-1.993281568	0.08759375	-6.831009734
14.15060976	11.64478588	-3.300265688	8.90457745
-9.419606301	-3.680966176	-2.551225375	-5.336370534
-12.47799816	8.597902769	-4.420920228	5.43392319
8.7284899	-14.75076086	-7.721999274	9.012977798
-6.973628279	-5.951821722	2.861809617	-4.533169436
7.013722115	-4.148672944	-3.023671696	-0.815201786
7.927749321	-4.870845787	5.699000099	4.736714695
4.989662086	9.015287403	15.39222611	-13.3682926
-3.278942169	-13.31598961	-10.65986841	11.61656453
-14.4423154	-6.779159248	15.06843652	14.62266476
8.666047166	-9.350094865	-2.720482278	-1.963925648
-10.72162556	-1.420273845	17.29346788	6.95093
9.008625036	-6.644768253	16.8498427	10.54983559
15.66045513	-8.41671546	7.349106614	-6.539931504
4.771517292	2.154471859	4.362709427	12.61629452
-7.797040863	12.71975243	-12.19644658	2.660765214
-1.993161219	-3.9031915	-3.415541835	5.198638855
-3.265239004	10.08102101	3.705021433	16.29263583
-3.054954562	-9.906596448	-11.08399949	11.126106
-14.05028013	-4.076046879	-2.929605776	-9.982304156
-11.88178562	13.45203629	-13.10783502	-14.33773823
-1.330859272	-4.185259769	1.191909169	-5.855190295
7.304701206	2.352128378	-12.55737481	13.3064189
-13.16855396	-14.59018216	-14.63989282	-3.366299938