Give the number of significant figures in the following : (a) 0.165 (b) 4.0026 (c ) 0.0256 (d) 201

Give the number of significant figures in the following : (a) 0.165 (b) 4.0026 (c ) 0.0256 (d) 201 (e) 0.050 (f) 2.653 `xx 10^(4)` (g) `6.02 xx 10^(23)` (h) 0.0006032

0.0256