Digital signal process

Given the DFT sequence X[K]=[ 11, -2 -1i,1, -2 +11]. Find the following a. Find 4-point IDFT of the DFT sequence X[K] using the matrix method. b. Plot the Amplitude spectrum c. Calculate power across 10 resistor Given the DFT sequence X[K]=[ 11, -2 -1i,1, -2 +11]. Find the following a. Find 4-point IDFT of the DFT sequence X[K] using the matrix method. b. Plot the Amplitude spectrum c. Calculate power across 10 resistor