Answer:
a.) a = 0 ms⁻²
b.) a = 9.58 ms⁻²
c.) a = 7.67 ms⁻²
Explanation:
a.) 
     Acceleration (a) is defined as the time rate of change of velocity
                         
  
 Given data 
  Final velocity = v₂ = 0 m/s
  Initial velocity = v ₁ = 0 m/s
   As the space shuttle remain at rest for the first 2 minutes i.e there is no change in velocity so, 
                   a = 0 ms⁻²
b.)
      Given data 
As the space shuttle start from rest, So initial velocity is zero
     Initial velocity = v₁ = 0 ms⁻¹
     Final velocity  = v₂ = 4600 ms⁻¹
      Time = t = 8 min = 480 s 
By the definition of Acceleration (a)
               
  
               
                      a = 9.58 ms⁻²
c.)
     Given data
As the space shuttle is at rest for first 2 min then start moving, So initial velocity is zero
     Initial velocity = v₁ = 0 ms⁻¹
     Final velocity  = v₂ = 4600 ms⁻¹
      Time = t = 10 min = 600 s 
By the definition of Acceleration (a)
               
  
               
                      a = 7.67 ms⁻²