please answer these, no need for steps

(1 point) In 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 each differential equation (enter '1 ' for first order, '2' for second order and so on; do not include the quotes); and (5) state whether the equation is linear or nonlinear. If your answer to (c) is nonlinear, make sure that you can explain why this is true. equation (a) independent (a) dependent (c) linearonlinear (1 point) Let thy" + 8ty' + 12y = 0. Find all values of r such that y = t satisfies the differential equation for t > 0. If there is more than one correct answer, enter your answers as a comma separated list. r = - help (numbers)(1 point) Let y'\" 13y" + 36y' = 0. Find all values of r such that y = 3\" satisfies the differential equation. If there is more than one correct answer, enter your answers as a comma separated list. r = DEpJnumbers)