Consider the circuit shown in the figure.



The value of v₀ (rounded off to one decimal place) is ______ V.

Consider two 16-point sequences x[n] and h[n]. Let the linear convolution of x[n] and h[n] be denoted by y[n], while z[n] denotes the 16-point inverse discrete Fourier transform (IDFT) of the product of the 16-point DFTs of x[n] and h[n]. The value(s) of k for which z[k] = y[k] is/are

The least number of squares that must be added so that the line P-Q becomes the line of symmetry is ______