Question 1202769
for 4 it is e^(-3.5)*3.5^4/4!=0.1888
for more than 6 it is 1-poisson cdf(3.5,6)=0.0653
for 4 or fewer it is 
0.1888 for 4
0.2158 for 3
0.1850 for 2
0.1057 for 1
0.0302 for 0
0.7254 is the answer