SMART WORK VS HARD WORK

In a certain code, “786' means 'study very hard', '958' means 'hard' work pays and 645' means 'study and work'. Which of the following it the code for 'very'?

If p: Ashok works hard: q: Ashok gets good grade The verbal form for (-p rarr q) is If Ashok works hard then gets good grade If Ashok does not work hard then he gets good grade If Ashok does not work hard the does not get good grade Ashok works hard if and only if he gets good grade

If p: Ashok works hard; q: Ashok gets goods grade The verbal form for (-pvec q) is alf Ashok works hard then gets grade b)If Ashok does not work hard then he gets grads grade c)If Ashok does not work hard then he does not get good grade d)Ashok works hard if and only if he gets good grade