Probability of ace drawn is: 4/52
Probability of heart drawn is: 13/52
For question (a)
P(ace or heart)=p(ace) + p(heart)
P(ace or heart)=4/52 + 13/52
P(ace or heart)=17/52
For question (b)
P(ace)' =1 - 4/52 = 48/52
P(heart) =1 - 13/52 = 39/52
P(neither ace nor heart) = 48/52 × 39/52