(a)[1]
A card is chosen at random from the $9$, its number is recorded and it is replaced. Find the probability that the card shows an odd number.
(b)[2]
Mandeep chooses a card at random from the $9$, records its number and then replaces it. She then chooses a second card at random. Find the probability that both cards show the number $1$.
(c)[3]
Mandeep chooses two of the $9$ cards at random without replacement and multiplies the two numbers shown. Find the probability that the product is less than $5$.