Help please answer to both please

Use the given information to find the unknown value. y varies directly as the cube of x. When x = 2, then y = 7. Find y when x = 3. Enter the exact answer. y = Question 4: (5 points) K - 7 2 10.1 Use the given information to find the unknown value. y varies inversely with the cube of x. When x = 5, then y = 1. Find y when x = 1. Enter the exact answer. y =