1) convert 1101 from binary to decimal
1101 = 1*2^3 + 1*2^2 + 1*2^0 = 8+4+1 = 13

2) convert 29 from decimal to binary

29/2 = 14 R 1
14/2 = 7  R 0
 7/2 = 3  R 1
 3/2 = 1  R 1
 1/2 = 0  R 1

 Answer = 11101

3) Convert 1011 1110 0010 1001 from binary to hex
             B   E     2    9

4) Convert 1CED from hex to binary  
    0001 1100 1110 1101

Remember in Hex:
A 10
B 11
C 12
D 13
E 14
F 15