Find the error(s) in each of the following, and explain how to correct it (them):

```
a) string string1{28}; // construct string1
string string2{'z'}; // construct string2
b) // assume std namespace is known
const char* ptr{name.data()}; // name is "joe bob"
ptr[3] = '-';
cout << ptr << endl;
```

a) Constructors for class string do not exist for integer and character arguments. Other
valid constructors should be used—converting the arguments to strings
b) Function data does not add a null terminator. Also, the code attempts to modify a
const char. Replace all of the lines with the code:
```
cout << name.substr(0, 3) + "-" + name.substr(4) << endl;
```