The forces F?, F2, F3, ..., Fn acting on an object are in equilibrium if the resultant force is the zero vector.F?+F2 +F3+.+Fn = 0The forces F? =7i-7j and F? = 6i+2j are acting on an object.a. Find the resultant force.b. What additional force is required for the given forces to be in equilibrium?a. The resultant force is(Simplify your answer. Type your answer in terms of i and j.)b. The additional force required for the given forces to be in equilibrium is(Simplify your answer. Type your answer in terms of i and j.)