(d).

MSSIM results: Lenna
Noise %	SVM-M1		SVM-M2		SVM-R
	μ	σ	μ	σ	μ	σ
10	0.985231	0.000228	0.985689	0.000188	0.985842	0.000181
20	0.964831	0.000407	0.969028	0.000366	0.969652	0.000358
30	0.936021	0.000549	0.949325	0.000391	0.950161	0.000462
40	0.891417	0.003147	0.925923	0.000477	0.926024	0.000398
50	0.847043	0.001220	0.896965	0.000344	0.893932	0.000713
60	0.777944	0.002245	0.862579	0.000881	0.850796	0.001099
70	0.679344	0.002105	0.820914	0.000564	0.788319	0.001127
80	0.386960	0.004851	0.768412	0.000831	0.693430	0.001324
90	0.046905	0.000822	0.687110	0.000864	0.526401	0.002583