This is my attempt at simplification below:

=

=

=

=

=

The revision handbook gives the following as options:

1.

2.

3.

4.

5. none of the above.

I'm second-guessing my calculation. Please could someone review my method?

This is my attempt at simplification below:

=

=

=

=

=

The revision handbook gives the following as options:

1.

2.

3.

4.

5. none of the above.

I'm second-guessing my calculation. Please could someone review my method?

=

=

=

=

=

The revision handbook gives the following as options:

1.

2.

3.

4.

5. none of the above.

I'm second-guessing my calculation. Please could someone review my method?

Ian wrote:This is my attempt at simplification below:

=

=

=

=

=

The revision handbook gives the following as options:

1.

2.

3.

4.

5. none of the above.

I'm second-guessing my calculation. Please could someone review my method?

yrs is the same as #2

Voilà! I completely (ashamedly) missed that. Thanks.