Punnett squares-heterozygous for all three traits

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Punnett squares-heterozygous for all three traits

How could you do the following questions without drawing the punnett squares?
1. If parents are heterozygous for all three traits, what isthe probability that an offspring is heterozygous for all threetraits?
a.) 1/64
b.) 2/64
c.) 4/64
d.) 8/64
e.) 32/64
2. If the parents were heterozygous for all three traits, whatis the probability that an offspring is heterozygous for one traitand homozygous recessive for one trait, and homozygous dominant forone trait?
a.) 1/64
b.) 2/64
c.) 4/64
d.) 8/64
e.) 32/64