Say if the ray bends toward the normal, away from the normal, or not at all…

Step 1. (a) Air ($1$) to water ($1.33$): denser, so toward the normal.

Step 2. (b) Glass ($1.5$) to air ($1$): rarer, so away.

Step 3. (c) Water ($1.33$) to glass ($1.5$): denser, so toward.

Step 4. (d) Glass ($1.5$) to water ($1.33$): rarer, so away.

Step 5. (e) Along the normal, there is no bending.