We use Huffmans algorithm to obtain an encoding of alphabet {a, b, c} with frequencies f_a, f_b, f_c. In each of the following cases, either give an example of frequencies (f_a, f_b, f_c) that would yield the specified code, or explain why the code cannot possibly be obtained (no matter what the frequencies are).

Code : {0, 10, 11}

Code : {0, 1, 00}

Code : {10, 01, 00}