please do this in C

Problem 2 Write a loop-less function to convert from Hex to Binary. HINT: Use a helper function/recursion) binHex [16] [5] {"0000","0001","00 10","0011","0100" , "0101", "0110","0111","1000","1001" ,"1010", "1011", "1100", "1101", "1110 const char 3 s char* hexToBinary (...)