Using the Live View Link, the image is extremely blurred,
but when I used the Preview Link, it looks sharper!
Also the image in the preview link is still not completely sharp and clear, I have tried inserting higher resolution images, i.e. 1.5x images size, 2x, 3x, and even 4x image size. But the most clear image that I have got is you can see in the second screenshot, it is the 2x version of the original image.