do you know by increasing risk free rate what would be the impact on cost of debt and equity?

Answer 1

Both would go up (usually)

K(e) = Rf + (Beta (Rm-Rf))
K(d) = (Rf + Corporate Yield Spread) x (1-tax shield)

If Rf goes up, Ke and Kd both up (except in weird situations where Beta is negative or Risk premium (Rm-Rf) is really small.