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# The prepasitiens p,q,r and s are dened by p: Mary takes the train : Mary walks r. Mary rides her bicycle 5: Mary drives her car Express the following...

For Question 2 I have the following answers:

i) If Mary doesn't take the train and walk, she rides her bicycle or drives her car.

ii) Mary takes the train or walks if and only if she drives her car and doesn't ride her bike

iii) If Mary doesn't ride her bicycle or drive her car, she walks or doesn't take the train

iv) If Mary neither walks nor takes the train. she drives her car or rides her bicycle.

I don't feel confident in these answers- iii) especially.

Any help would be appreciated

The prepasitiens p,q,r and s are deﬁned by p: Mary takes the train
:1: Mary walks r. Mary rides her bicycle
5: Mary drives her car Express the following In symbolic term. {i} If Maryr does not drive her car, then she takes the train and she walks. {ii} If Mary neither takes the train ner rides her bicycle then she walks and
drives her car. {ill} Mary walks and rides her bicycle if, and nnly if, she neither takes the
train nor drives her car. {iv} Mary walks er takes the train If she neither rides her bicycle nor drives
her car. Using the notation in IQuestien 1, translate the fellewing expressiens lnte English.
in swam} {in (pvq)H{M-r) {ill} {—9 vq] a-{rv 3) {iv} {snr}v(-—qn—p}

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