Draw the mass-spectrum pattern as expected for the molecular

Question

Phosphorous and Fluorine both exist as only one natural isotope (¹⁹F and ^31P, respectively), whereas chlorine has two (³⁵Cl and³⁷Cl; 75% and 25% relative abundance, respectively). Draw the mass-spectrum pattern as expected for the molecular ion of PF₂Cl₃, indicating in the amu to the relative intensity and nearest integer for each by writing in values for the x-axis. Put numbers on the tick marks on the x-axis. Use simply calculations to explain your mass and intensity values for the peaks you draw.