Identify the Correct Distribution (Z, T, or Neither) for Each

Identify the correct distribution (z, t, or neither) for each of the following. $$\begin{array} { | l | l | l | l | } \hline \text { Sample Size } & \begin{array} { l } \text { Standard } \\\text { deviation }\end{array} & \begin{array} { l } \text { Shape of the } \\\text { distribution }\end{array} & \text { z or t or neither } \\\hline n = 35 & s = 4.5 & \text { Somewhat skewed } & \\\hline n = 20 & s = 4.5 & \text { Bell shaped } & \\\hline n = 25 & \sigma = 4.5 & \text { Bell shaped } & \\\hline n = 20 & \sigma = 4.5 & \text { Extremely skewed } & \\\hline\end{array}$$