sorry teacher but I thought strap12345 was having problems as he/she was posting lots of questions one after the other so thought they could look up the answers themselves on that site
jan
Strap,
Fibonacci has asked before that you put your questions in just one post so that the other posts don't get pushed off the bottom of the page. It is the courteous thing to do on here.
PS, the odd thankyou wouldn't go amiss!