You were expected to have looked at the tutorial beforehand and to have come with prepared answers. This is not because the work forms part of the in course assessment (which it does not) but to enable the group to spend time discussing the more remote possibilities…
This is most likely to be an X linked recessive. It is clearly not too severe - might be something like colour blindness.
This is most likely to be an autosomal recessive. There's not much that you can add except perhaps to point out that if you have one affected person the people who are most likely also to be affected are his/her siblings. e.g. cystic fibrosis
This also looks like an X linked recessive. Its unlucky that all three sisters in the second generation are carriers but not impossible. An example of an X linked recessive lethal is haemophilia
Probably autosomal dominant but only because X linked dominants are so very rare. Look at the way that females pass it to both sexes whereas males transmit it to all their daughters and none of their sons. Looks very X linked doesn't it! How do you know it's not mitochondrial? An example of an X linked dominant is chondrodysplasia punctata
A strange one. If you guessed that it's X linked recessive because only males are affected you are wrong. There is transmission through a female (II2) which is OK. But there is also transmission from male to male, twice, which is impossible if X linked. A possible answer might be autosomal dominant with sex limited expression. e.g. androgenetic alopecia (male pattern baldness)
For the Bayes Theorem calculation see these notes:
And the additional information on Bayes theorem: