Answer:

a)4

Step-by-step explanation:

a)

[tex] {2}^{2} \times {3}^{x} [/tex]

[tex]x = 0[/tex]

[tex]4 \times 1[/tex]

[tex]4[/tex]

b)

[tex] {2}^{2} \times 3 \times 5[/tex]