LD...la maile lekhidiye hai, here is the pseudocode

a)
   declare a two dimensional array int a[3][5];

   for i =1 to 3
     {
        print Enter values  for set  i
         for j =1 to 5
         {
           print Enter Value for a[i][j];
           read value for a[i][j];
       }
}

b) compute the average of each set of 5 values
   
    int avg;
    for i =1 to 3
     {
       int sum=0;
        Print Average value for set i is
        for j =1 to 5
          {
             sum=sum+a[i][j];
          }
           avg= sum/5;
          print avg;
    }
 
   c)  compute the avg of values

    int sum=0;
    int avg;
    for i =1 to 3
     {
   
        for j =1 to 5
          {
             sum=sum+a[i][j];
          }
        
    }
   avg=sum/15;


d) determine the largest of three values
     int max=0;
      for i=1 to 3
       {
        for j=1 to 5
          {
             if a[i][j]>max
               {
                   max=a[i][j];
                }
           }
         }

e)
display array
display avg of b
display avg of c
display max of d