Seven businessmen, G, H, I, J, K, L and M, travelled in the same month on different dates 4^th, 8^th, 11^th, 14^th, 17^th, 22^nd and 28^th (but not necessarily in the same order). L travelled the last. K travelled just after I but before J. K travelled on the 11^th, Only two people travelled between K and M. Exactly one person travelled between G and K, and K travelled after G. On which date did M travel?