The prepasitiens p,q,r and s are dened 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(-qnp}