Mr.Smith staggered home after a long night at the local pub, While attempting to navigate the stairs, he passed out cold and laid all night with his right armpit straddling the staircase banister. When he awoke the next morning, he had a severe headache, but what bothered him more was that he had no sensation in his right arm and hand. Explain : a-why did the alcohol do to make it difficult to walk up the stairs; b- why did the alcohol made him pass out; c- why the headache;d- why the lack of sensation