3-In mice, the ability to run normally is a dominant trait. Mice with this trait are called running mice (R). The recessive trait causes mice to run in circles and we call these waltzing mice (r). Hair color is also inherited. Black hair (B) is dominant over brown hair (b). Suppose a h0m0zygous waltzing, heter0zygous black hair mouse was crossed with a heter0zygous running, h0m0zygous brown hair mouse. If we look at the offspring, % will be heter0zygous running and heter0zygous black hair. (Please provide a number only in the blank)