Assertion (A): If the roots of the quadratic equation \(q-r)x^2+(r-p)x+(p-q)=0\) are real and equal then \(2q=p+q\)
 
Reason (R): The least positve value of \(k\) when the quadratic equation \(x^2+kx+4=0\) has real roots is \(4\).