1. If the average of the \(n\) numbers \(x_1, x_2, x_3, ..., x_n\) is \(\bar{x}\), then the average of \(Kx_1, Kx_2, Kx_3, ..., Kx_n\) is —— (where \(K \ne 0\)).

2. If the average of \(x_1, x_2, x_3, \ldots, x_n\) is \(\bar{x}\), then the average of \(ax_1, ax_2, ax_3, \ldots, ax_n\) is ________, where \(a ≠ 0\).

3. If the average of \(x_1, x_2, x_3, ... , x_n\) is \(\bar{x}\), then the average of \(k + x_1, k + x_2, k + x_3, ... , k + x_n\) is \(k + \bar{x}\).