A physical quantity 'y' is represented by the formula y \(=m^2r^{-4}g^x l^{-\frac{3}{2}}\)
If the percentage errors found in y, m, r, l and g are 18, 1, 0.5, 4 and p respectively, then find the value of x and p.
(1) 5 and ± 2
(2) 4 and ± 3
(3) \(\frac{16}{3}\) and ± \(\frac{3}{2}\)
(4) 8 and ± 2