The following cash transactions were among those reported by Cambridge County's Wastewater Enterprise Fund for the year:

Proceeds from sale of revenue bonds for construction $ $5,000,000$

Interest income $300,000$

Capital contributed by developers $1,000,000$

In the Wastewater Enterprise Fund's statement of cash flows for the year ended December $31,$ what amount should be reported as cash flows from investing activities?

Multiple Choice

$$300,000.$

$$1,300,000.$

$$5,300,000.$

$$6,300,000.$