How would you represent a single cyan-colored pixel in Base64 encoding? (Hint: first think about how to represent cyan as a three-byte binary number, and then do the Base64 encoding from the lecture.)

The answer is "AP//"

Explanation:

In the given question choices were missing so, the correct choice can be defined as follows:

The 3-bit color description of 'CYAN' is 011 if we convert it into 3- byte binary representation, we get,  the 3- byte binary representation that is equal to 011 =  00000000 11111111 11111111  and to split the 3-byte description into 6-bit subset to transform into Base64. so, we get:  000000 001111 111111 111111

if we have the Base64 alphabet table to convert the 6-bit representation towards its comparable letter or character by the 6-bit subgroup, that can be defined as follows:

answer: a, c

divide any of the y values by x values and you will always get 3 is the most simple way i can put it for you.