Combining Pseudo-Classes in LESS

The ampersand is useful when working with pseudo-classes. See the example:

styles.lessa {
  color: blue;
  &:hover {
    color: red;
  }
}

Compilation result:

styles.cssa {
  color: blue;
}
a:hover { 
  color: red;
}

Задание 1

Tell me what the result of compiling the following code will be:

styles.lessa.class {
  &:link {
    color: red;
  }
  &:visited {
    color: blue;
  }
  &:hover {
    color: green;
  }
}

Задание 2

Simplify the given code:

styles.css#block {
  width: 300px;
}
#block a:link, #block a:visited {
  color: red;
}
#block a:hover {
  color: blue;
}