The basic storage unit of a digital computer is a "bit". a bit is a storage position thatcan be designated as either on (1) or off (0) at any given time. in converting pictureimages to a form that can be transmitted electronically, a picture element, called apixelis used. each pixel is quantized into gray levels and coded using a binary code. for example, a pixel with four gray levels can be coded using two bits by designatingthe gray levels by 00, 01, 10 and 11.(1) how many gray levels can be quantized using a four-bit code? (2) how many bits are necessary to code a pixel quantized to 32 gray levels?