L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]

def by_name(t):

    return sorted(L,key = lambda x:x[0])

def by_score(t):

    return sorted(L,key = lambda x:x[1],reverse= True)

t = L

a=by_name(t)

b=by_score(t)

print(a)

print(b)