I'm not trying to have "the homework" made for me (believe me, I'd rather I could do it myself). I just need help in breaking the ice with such type of problems.Find 4th power of polynomial $\displaystyle x+1$ with the help of iterative DFT. Use ring $\displaystyle Z_{41}$ where, for example, $\displaystyle 5*9=4$, $\displaystyle 3*14=1$, $\displaystyle 6*7=7$, $\displaystyle 8*36=1$.