Use the pbinom() function in r to show the cumulative probability of getting 0, 1, 2, 3, or 4 heads when you flip the coin 4 times (this is the same as finding the probability than the value is less than or equal to 0, 1, 2, 3, or 4.)

a. probability of getting no more than 0 heads: 0.0625
b. probability of getting no more than 1 head: 0.3125
c. probability of getting no more than 2 heads: 0.6875
d. probability of getting no more than 3 heads: 0.9375
e. probability of getting no more than 4 heads: 1. 4.