Identify the vertex of the graph. Tell whether it is a minimum or maximum. ring

O (2,-4); minimum
(-4, 2); minimum
and
O (2, -4); maximum
O.(-4, 2); maximum

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.