(Solved): problems below, (a) identify the independent variable and the dependent varia ...

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problems below, (a) identify the independent variable and the dependent variable of each equation (use 't' for the independent variable if an independent variable is not given explicitly); (b) give the order of ach differential equation (enter ' 1 ' for first order, '2' for second order and so on; do not include the quotes); and (c) state whether the equation is linear or nonlinear. If your answer to (c) is nonlinear, make sure hat you can explain why this is true.