Four questions

Peace be upon the wise man Abraham,
A. The person who is shaken from his sleep is slightly shaken and can go back to sleep, but is only thirsty for a drink, or needs to irrigate his nostrils – should he wash his hands and recite a blessing? Perhaps it will make it difficult to go back to sleep if he washes…
B. The Rabbi of Mazal warned that those who have not studied various sciences should not continue to study in the MUN. How should this be addressed today – to study actual sciences, or to have a general education about these sciences, or is it no longer meaningful because the medieval sciences to which the teacher refers are no longer up-to-date?
third. Someone who does not have a tradition of prayer at home – how should they relate to the 'daily order' that is not the Kash and its blessings, and the Eighteen? For example: offerings, the pouring of incense, tachanun, for the conductor, a song of the day – to what extent are they obligatory, in general, and in particular if one is in a hurry or preoccupied, as in the reserves?
D. Are university students among them 'who did not show respect for each other' and how can we work to strengthen this issue?
Thank you for your work.