A ternary string is a string made up of 0's, 1's. and 2's. A) How many ternary strings of length 4 are there?=

B) How many ternary strings of length 4 start with a 1?
Number of 4 digit ternary strings starting with 1 =

C)How many ternary strings of length 4 start with a 1 *and* end with a 1?
Number of 4 digit ternary strings starting and ending with 1=

D) How many ternary strings of length 4 start with a 1 *or* end with a 1?
Number of 4 digit ternary strings starting or ending with with 1 =