Hi, my answer for section c of the problem was incorrect. I could not figure out the solution for it.

Please help.

3.93216E+05 3.93216 x 106 5056 960 + 1536 + 2560 (1 point) We usually write numbers in decimal form (or base 10), meaning numbers are composed using 10 different "digits\" {0,1,. . . ,9}. Sometimes though it is useful to write numbers hexadecimal or base 16. Now there are 16 distinct digits that can be used to form numbers: {0, 1, . . . , 9, A, B, C, D, E, F}. So for example, a 3 digit hexadecimal number might be 288. a. How many 4-digit hexadecimals are there in which the rst digit is E or F? 8192 b. How many 6-digit hexadecimals start with a letter (AF) and end with a numeral (0-9)? 3932160 c. How many 3-digit hexadecimals start with a letter (AF) or end with a numeral (0-9) (or both)? 960+1536