Which of the following statements accurately describes the computational complexity of circular convolution using the direct summation method?Select one:a. The computational complexity is always O(N^2), where N is the length of the input sequences.b. The computational complexity is independent of the length of the input sequences.c. The computational complexity is always O(N log N), where N is the length of the input sequences.d. The computational complexity depends on the specific properties of the input sequences and can vary.

Which of the following statements accurately describes the computational complexity of the Fast Fourier Transform (FFT) algorithm for computing the DFT of a sequence of length 𝑁?Select one:a.The computational complexity is 𝑂(𝑁log⁡𝑁).b.The computational complexity is 𝑂(𝑁).c. The computational complexity depends on the specific properties of the input sequence and can vary.d.The computational complexity is 𝑂(𝑁2).

Which of the following statements accurately describes the computational complexity of the overlap-add and overlap-save methods for performing convolution?Select one:a. The overlap-add method has higher computational complexity than the overlap-save method.b. The computational complexity of both methods depends on the specific properties of the input signals.c. The overlap-save method has higher computational complexity than the overlap-add method.d. Both methods have the same computational complexity.

Q2(b) What will be the time complexity of the following? Give proper explanation. for (int j = 4; j<n; j=j+2) { val = 0; for (int i = 0; i<j; ++i) { val = val + i* j; for (int k = 0; k < n; ++k) val++; } }

When evaluating the complexity of a loop, all statements in the loop body are considered to be O(1). A. True B. False

Which of the following is the time complexity of searching for an element in a circular linked list?OptionsO(1)O(n2)O(nlogn)O(n)