Kindly send all answers:

In testing a certain kind of truck tire over rugged terrain, it is found that 20% of the trucks fail to complete the test run without a blowout. Of the next 15 trucks tested, find the probability that

a. from 3 to 6 have blowouts;

b. more than 5 have blowouts;

c. fewer than 4 have blowouts;

NOTE: THREE DECIMAL PLACES ONLY, SEND HANDWRITTEN SOLUTIONS. THANK YOU