A small cart is released from rest at height \(h\) on a frictionless track that leads into a vertical circular loop of radius \(R = 1.2\text{ m}\). To maintain contact with the track at the highest point of the loop, the cart must have a minimum speed of \(v_{\text{top}} = \sqrt{gR}\). What is the minimum release height \(h\) required for the cart to complete the loop?