the man didn't know____the problem

the man didn't know____the problem
1.how to deal with the problem
2.what to deal with
3.how could he deal with the problem
4.what could he deal with
how far is the seaside?
1.four-hour 2.four hours 3.four-hour 4.four hour
he___something to himself on his way to home yesterday
1.telling 2.saying 3.speaking 4.talking