Are these 3 answers correct? I think the "position" thing is confusing me. thanks

The following questions ask you what value a given number has for a given number in a given base. Write your answers in exponent form (10*3) or a number multiplied by the exponent form (11*10*4). Keep in mind that we start from position 0. For example: 2.) In decimal, how much is a l in position 3 worth? 2.answer) 10 3 3.) In binary, how much is a 1 in position 4 worth? 3.answer) 16 4.) In octal, how much is a 1 in position 4 worth? 4.answer) 4096