A new drug cures 70 ​% of the patients to whom it isadministered. It is given to 28 patients. Find the probabilitiesthat among these​ patients, the following results occur. Use thenormal distribution approximation to the binomial distribution.
​(a) Exactly 22 are cured.
​(b) All are cured.
​(c) No one is cured.
​(d)14 or fewer are cured.
