Add spaces: Thefirsttwovolumescoverhisideasonthephilosophyoflogic,thethirdvolumepresentsatheoryofscientificdiscovery,whilethefinalvolumepresentshismethodologyofwritingtextbooks:

Answer: The first two volumes cover his ideas on the philosophy of logic, the third volume presents a theory of scientific discovery, while the final volume presents his methodology of writing textbooks :
9Iwasdumb,Iopenednotmymouth;becausethoudidstit.

9 I was dumb, I opened not my mouth; because thou didst it.
[Q]: [Eachweeklasts90secondsforwhichaplayermayplacehis/herbetsupuntil10secondsbeforethestartofeachround.]
[A]: [Each week lasts 90 seconds for which a player may place his/her bets up until 10 seconds before the start of each round.]
Problem: Add spaces: Overallstudentrating:4.0/5.0(121reviews)

Spaces added: Overall student rating: 4.0 /5.0 (121 reviews)
This text is missing some spaces, please add them: ShowfamilytreestartingwithKatrineJrgensdatter
Show family tree starting with Katrine Jrgensdatter
[Q]: [March2014Iamgratefulforthemostusefuland]
[A]:
[March 2014I am grateful for the most useful and]