4. If U ={x: x is a positive integers less than or equal to 20), A ={y:y is a prime number, B ={z :z is a factor of 18) and C ={p :p is a multiple of 3 less then 20), find the cardinality of the following sets by drawing the Venn diagram : i. n(AUB) ii. n(BUC) iii. n(AUBUC) iv. n(ABNC) v. n(A) vi. n (B) vii. n (C)​

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?