I whipped up a quick answer to q2; I don't know if it's right. https://www.patrickstevens.co.uk/misc/TokyoEntrance2016/TokyoEntrance2016.pdf https://www.patric

I whipped up a quick answer to q2; I don't know if it's right. https://www.patrickstevens.co.uk/misc/TokyoEntrance2016/TokyoEntrance2016.pdf https://www.patrickstevens.co.uk/misc/TokyoEntrance2016/Toky...