Define a grammar by setting -10} and let F consist of the following instruction formulas. 1, NV. 2. N n, for some n E the, she, Jos, Sal, Anna 3. V v, for some VE runs, jumps, skips, falls, swims). 5. P p, for some p E and, while until. either or . Give derivations for the following string in the given grammar. Either Sal runs or he swims. Either or Either N V or NV Either Sal V or he V Either Sal runs or he swims formula initial string formula? formula? (2 times) formula (2 times) (2 times)