How masses bytes of memory will a full peak occupy?

High resolution VGA clear displays for PC’s offer 640 horizontal by 480 vertical picture elements or pixels. In sixteen colour hi-res VGA mode, respectively pixel is described by 4 bits (24=16 possible states). How many bytes of memory will a full blind occupy?

Answer:
640x480 - 4-bit, 16 colors =153,600 bytes
640x480 - 8-bit, 256 colors =307,200 bytes
640x480 - 16-bit, 65,536 colors =614,400 bytes
640x480 - 24-bit, 16,777,216 colors =921,600 bytes
800x600 - 4-bit, 16 colors =240,000 bytes
800x600 - 8-bit, 256 colors =480,000 bytes
800x600 - 16-bit, 65,536 colors =960,000 bytes
800x600 - 24-bit, 16,777,216 colors =1,440,000 bytes
1,024x768 - 4-bit, 16 colors =393,216 bytes
1,024x768 - 8-bit, 256 colors =786,432 bytes
1,024x768 - 16-bit, 65,536 colors =1,572,864 bytes
1,024x768 - 24-bit, 16,777,216 colors =2,359,296 bytes
1,280x1,024 - 4-bit, 16 colors =655,360 bytes
1,280x1,024 - 8-bit, 256 colors =1,310,720 bytes
1,280x1,024 - 16-bit, 65,536 colors =2,621,440 bytes
1,280x1,024 - 24-bit, 16,777,216 colors =3,932,160 bytes
simple, 1 bit per pixel for the reolution. *edit* multiplied by the bits per bixel

Width X Height X BPP
. simple
p.s. BPP = bits per pixel

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