Final answer:
The evidence for XJ1417+52 being an intermediate-mass black hole includes detection of gravitational waves, X-ray spectral features, and radio emissions.
Step-by-step explanation:
The evidence for XJ1417+52 being an intermediate-mass black hole includes:
a) Detection of gravitational waves: Gravitational wave events have been detected from mergers of black holes, including XJ1417+52, which is indicative of the presence of a black hole.
b) X-ray spectral features: X-ray emission from an accretion disk around a compact object in binary star systems is characteristic of black holes. If XJ1417+52 exhibits these features, it provides evidence for being an intermediate-mass black hole.
d) Radio emissions: Black holes can produce radio emissions from the material falling into them. If XJ1417+52 displays radio emissions, it suggests it is an intermediate-mass black hole.