Matlab,image processing

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5. Discussion: 1. What type of image is coins.png? 2. Why do we use the semicolon (-) operator after the imread statement? 3. What happens if we omit it? 4. How many dimensions does the variable X_rgb have and what are their sizes? 5. What class type is X_gray? 6. In the case where an intensity image and an indexed image are both displayed in one figure, using the subplot function, why must use the subimage function. 5. Discussion: 1. What type of image is coins.png? 2. Why do we use the semicolon (-) operator after the imread statement? 3. What happens if we omit it? 4. How many dimensions does the variable X_rgb have and what are their sizes? 5. What class type is X_gray? 6. In the case where an intensity image and an indexed image are both displayed in one figure, using the subplot function, why must use the subimage function