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Question 1

Trapezius

Answer 1

Elevation and rectraction of scapula (along with rhomboids)
Abduction beyond 90
Steadies the scapula

Question 2

Latissimus dorsi

Answer 2

Adduction, extension and medial rotation as in -
Swimming, rowing, climbing, pulling, folding the arm behind the back
Violent expiratory effort
Hold inferior angle of scapula in place

Question 3

Levator scapula

Answer 3

Elevation of scapula

Steadies scapula during movements or arm

Question 4

Rhomboid major and minor

Answer 4

Retraction of scapula