The value of x + y + z is 15 if a, x, y, b are in A.P. while the value of 1x+1y+1z is 58 if a, x, y, z b are H.P., then a2+b2=
The value of x+y+z is 15 if a,x,y,z,b are in A.P. while the value of 1x+1y+1z is 53 if a,x,y,z,b are in H. P. Then the value of and b are