The A5 , Am(7M) and A5 is basically a step down of the fourth string:

      A5     Am(7M) A5
e | ----0-------0--------0------- | 
B | ----1-------1--------1------- | 
G | ----2-------1--------0------- | 
D | ----2-------2--------2------- | 
A | ----0-------0--------0------- | 
E | ----x-------x--------x------- | 

The B7 can be played in various ways, I like the sound of this one:

e | ----2--- | 
B | ----0--- | 
G | ----2--- | 
D | ----1--- | 
A | ----2--- | 
E | ----x--- | 


  A5       Am(7M)    A5      D5
  A gentle breeze from hushabye mountain

  F5      A5         B5      E5
  Softly blows o'er lullaby bay

  A5           Am(7M) A5            D5
  It fills the sails of boats that are waiting

  F5          A5        E5      A5
  Waiting to sail your worries away

  
  D5        B5        E5 



  A5       Am(7M) A5      D5
  It isn?t far to   hushabye mountain

  F5        A5         B5          E5
  And your boat waits down by the quay

  A5           Am(7M)  A5        D5
  The winds of night so  softly are sighing

  F5              A5       E5           A5
  Soon they will fly your troubles to sea



  D5            A5       F5        G5
  So close your eyes on hushabye mountain

  Bb5   D5         B5            E5
  Wave goodbye to cares of the day

      A5         Am(7M)  A5      D5
  And Watch your boat from hushabye mountain

  F5        A5        E5       A5
  Sail far away from lullaby bay