1. You are developing a financial application that processes transactions up to $10 trillion. Which integer data type should you use to store transaction amounts, and why?

2. What is wrong with the following Java code?

```java
int 3score = 95;
double total# = 100.5;
String first Name = "Alice";
```

To store transaction amounts up to $10 trillion in a financial application, you should use the long data type in Java. This is because the long data type is a 64-bit signed integer, which can store values from -2^63 to 2^63-1. This range is more than sufficient to handle amounts up to $10 trillion, which is 10 followed by 12 zeros, or $10,000,000,000,000.
There are several syntax errors in the given Java code:
- int 3score = 95; : In Java, variable names cannot start with a digit. To fix this, you can rename the variable to something like int score3 = 95;.
- double total# = 100.5; : The hash symbol # is not allowed in Java variable names. A valid variable name could be double totalAmount = 100.5;.
- String first Name = "Alice"; : Variable names cannot contain spaces. You should remove the space or use another character like an underscore. For instance, String firstName = "Alice"; is a valid declaration.

1. You are developing a financial application that processes transactions up to $10 trillion. Which integer data type should you use to store transaction amounts, and why?2. What is wrong with the following Java code?```javaint 3score = 95;double total# = 100.5;String first Name = "Alice";```