Use Haar wavelet (Averaging and differencing) to expand the given array i-Expand the given array using Haar wavelet into approximation and details input array = 15 13 11 21 16 26 21 13 4 8 -1 5 0 -2 0 10 ii- denoise using hard threshold of details =1. iii- denoise using soft threshold of details=1 iv- find the RMSE between the origianl and the hard and soft denoised signals. RMSE of hard threshold RMSE of soft threshold