Answer:
See below, please.
Step-by-step explanation:
The value of tiger will be 12, which is the length of the string "Hello world!" stored in the variable 'phrase'.
The length() method in Java returns the number of characters in a string. Here, it is applied to the string "Hello world!" stored in the variable 'phrase', and the resulting value (which is 12) is assigned to the variable 'tiger'.